1156332440 has 16 divisors (see below), whose sum is σ = 2601748080. Its totient is φ = 462532960.

The previous prime is 1156332433. The next prime is 1156332449. The reversal of 1156332440 is 442336511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156332449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14454116 + ... + 14454195.

It is an arithmetic number, because the mean of its divisors is an integer number (162609255).

Almost surely, 2^1156332440 is an apocalyptic number.

1156332440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156332440 is an abundant number, since it is smaller than the sum of its proper divisors (1445415640).

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

1156332440 is a wasteful number, since it uses less digits than its factorization.

1156332440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28908322 (or 28908318 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1156332440 is about 34004.8884721006. Note that the first 3 decimals coincide. The cubic root of 1156332440 is about 1049.6090577859.

Adding to 1156332440 its reverse (442336511), we get a palindrome (1598668951).

The spelling of 1156332440 in words is "one billion, one hundred fifty-six million, three hundred thirty-two thousand, four hundred forty".