1115640256 has 28 divisors (see below), whose sum is σ = 2215306720. Its totient is φ = 557452800.

The previous prime is 1115640241. The next prime is 1115640259. The reversal of 1115640256 is 6520465111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115640259) 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, 110425 + ... + 120103.

Almost surely, 2^1115640256 is an apocalyptic number.

1115640256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1115640256 is a deficient number, since it is larger than the sum of its proper divisors (1099666464).

1115640256 is an equidigital number, since it uses as much as digits as its factorization.

1115640256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11492 (or 11482 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1115640256 is about 33401.2014155180. The cubic root of 1115640256 is about 1037.1495714180.

The spelling of 1115640256 in words is "one billion, one hundred fifteen million, six hundred forty thousand, two hundred fifty-six".