931157980 has 12 divisors (see below), whose sum is σ = 1955431800. Its totient is φ = 372463184.

The previous prime is 931157963. The next prime is 931157987. The reversal of 931157980 is 89751139.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (931157987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23278930 + ... + 23278969.

It is an arithmetic number, because the mean of its divisors is an integer number (162952650).

Almost surely, 2^931157980 is an apocalyptic number.

It is an amenable number.

931157980 is an abundant number, since it is smaller than the sum of its proper divisors (1024273820).

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

931157980 is a wasteful number, since it uses less digits than its factorization.

931157980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46557908 (or 46557906 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 931157980 is about 30514.8812876603. The cubic root of 931157980 is about 976.5049666227.

The spelling of 931157980 in words is "nine hundred thirty-one million, one hundred fifty-seven thousand, nine hundred eighty".