1156369860 has 36 divisors (see below), whose sum is σ = 3507655788. Its totient is φ = 308365248.

The previous prime is 1156369813. The next prime is 1156369891. The reversal of 1156369860 is 689636511.

1156369860 is a `hidden beast` number, since 1 + 1 + 5 + 636 + 9 + 8 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 696009924 + 460359936 = 26382^2 + 21456^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 3211959 + ... + 3212318.

It is an arithmetic number, because the mean of its divisors is an integer number (97434883).

Almost surely, 2^1156369860 is an apocalyptic number.

1156369860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156369860 is an abundant number, since it is smaller than the sum of its proper divisors (2351285928).

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

1156369860 is a wasteful number, since it uses less digits than its factorization.

1156369860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424292 (or 6424287 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1156369860 is about 34005.4386826578. The cubic root of 1156369860 is about 1049.6203797743.

The spelling of 1156369860 in words is "one billion, one hundred fifty-six million, three hundred sixty-nine thousand, eight hundred sixty".