1156343040 has 360 divisors, whose sum is σ = 4362795360. Its totient is φ = 291631104.

The previous prime is 1156343033. The next prime is 1156343047. The reversal of 1156343040 is 403436511.

It is an interprime number because it is at equal distance from previous prime (1156343033) and next prime (1156343047).

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1156342995 and 1156343013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156343047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1969627 + ... + 1970213.

It is an arithmetic number, because the mean of its divisors is an integer number (12118876).

Almost surely, 2^1156343040 is an apocalyptic number.

1156343040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2181397680).

1156343040 is an abundant number, since it is smaller than the sum of its proper divisors (3206452320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156343040 is an equidigital number, since it uses as much as digits as its factorization.

1156343040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1156343040 is about 34005.0443316870. The cubic root of 1156343040 is about 1049.6122650014.

Adding to 1156343040 its reverse (403436511), we get a palindrome (1559779551).

The spelling of 1156343040 in words is "one billion, one hundred fifty-six million, three hundred forty-three thousand, forty".