1115652978 has 24 divisors (see below), whose sum is σ = 2636998416. Its totient is φ = 338076600.

The previous prime is 1115652943. The next prime is 1115652983. The reversal of 1115652978 is 8792565111.

1115652978 is a `hidden beast` number, since 1 + 1 + 1 + 56 + 529 + 78 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2817108 + ... + 2817503.

It is an arithmetic number, because the mean of its divisors is an integer number (109874934).

Almost surely, 2^1115652978 is an apocalyptic number.

1115652978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1115652978 is an abundant number, since it is smaller than the sum of its proper divisors (1521345438).

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

1115652978 is a wasteful number, since it uses less digits than its factorization.

1115652978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634630 (or 5634627 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1115652978 is about 33401.3918572265. The cubic root of 1115652978 is about 1037.1535137183.

The spelling of 1115652978 in words is "one billion, one hundred fifteen million, six hundred fifty-two thousand, nine hundred seventy-eight".