1156458640 has 40 divisors (see below), whose sum is σ = 2690508600. Its totient is φ = 462283776.

The previous prime is 1156458637. The next prime is 1156458661. The reversal of 1156458640 is 468546511.

It can be written as a sum of positive squares in 4 ways, for example, as 430479504 + 725979136 = 20748^2 + 26944^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1156458593 and 1156458602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152212 + ... + 159628.

It is an arithmetic number, because the mean of its divisors is an integer number (67262715).

Almost surely, 2^1156458640 is an apocalyptic number.

1156458640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156458640 is an abundant number, since it is smaller than the sum of its proper divisors (1534049960).

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

1156458640 is a wasteful number, since it uses less digits than its factorization.

1156458640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9379 (or 9373 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 1156458640 is about 34006.7440370289. The cubic root of 1156458640 is about 1049.6472405322.

The spelling of 1156458640 in words is "one billion, one hundred fifty-six million, four hundred fifty-eight thousand, six hundred forty".