1157972580 has 36 divisors (see below), whose sum is σ = 3512517372. Its totient is φ = 308792640.

The previous prime is 1157972579. The next prime is 1157972587. The reversal of 1157972580 is 852797511.

1157972580 is a `hidden beast` number, since 1 + 1 + 579 + 72 + 5 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 166100544 + 991872036 = 12888^2 + 31494^2 .

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 not an unprimeable number, because it can be changed into a prime (1157972587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3216411 + ... + 3216770.

It is an arithmetic number, because the mean of its divisors is an integer number (97569927).

Almost surely, 2^1157972580 is an apocalyptic number.

1157972580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157972580 is an abundant number, since it is smaller than the sum of its proper divisors (2354544792).

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

1157972580 is a wasteful number, since it uses less digits than its factorization.

1157972580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433196 (or 6433191 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The square root of 1157972580 is about 34028.9961650355. The cubic root of 1157972580 is about 1050.1050779194.

The spelling of 1157972580 in words is "one billion, one hundred fifty-seven million, nine hundred seventy-two thousand, five hundred eighty".