1156566240 has 72 divisors (see below), whose sum is σ = 3946787208. Its totient is φ = 308417280.

The previous prime is 1156566223. The next prime is 1156566277. The reversal of 1156566240 is 426656511.

1156566240 is a `hidden beast` number, since 1 + 1 + 56 + 566 + 2 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1156566195 and 1156566204.

It is a congruent 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, 400146 + ... + 403025.

It is an arithmetic number, because the mean of its divisors is an integer number (54816489).

Almost surely, 2^1156566240 is an apocalyptic number.

1156566240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156566240 is an abundant number, since it is smaller than the sum of its proper divisors (2790220968).

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

1156566240 is a wasteful number, since it uses less digits than its factorization.

1156566240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803192 (or 803181 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1156566240 is about 34008.3260393687. The cubic root of 1156566240 is about 1049.6797935167.

The spelling of 1156566240 in words is "one billion, one hundred fifty-six million, five hundred sixty-six thousand, two hundred forty".