1115515440 has 120 divisors (see below), whose sum is σ = 4034481360. Its totient is φ = 274586112.

The previous prime is 1115515399. The next prime is 1115515451. The reversal of 1115515440 is 445155111.

1115515440 is a `hidden beast` number, since 1 + 115 + 5 + 1 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50230 + ... + 68949.

It is an arithmetic number, because the mean of its divisors is an integer number (33620678).

Almost surely, 2^1115515440 is an apocalyptic number.

1115515440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115515440 is an abundant number, since it is smaller than the sum of its proper divisors (2918965920).

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

1115515440 is a wasteful number, since it uses less digits than its factorization.

1115515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119211 (or 119202 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 1115515440 is about 33399.3329274703. The cubic root of 1115515440 is about 1037.1108917785.

The spelling of 1115515440 in words is "one billion, one hundred fifteen million, five hundred fifteen thousand, four hundred forty".