57163640 has 32 divisors (see below), whose sum is σ = 133056000. Its totient is φ = 22076544.

The previous prime is 57163621. The next prime is 57163643. The reversal of 57163640 is 4636175.

It is a junction number, because it is equal to n+sod(n) for n = 57163597 and 57163606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57163643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23480 + ... + 25799.

It is an arithmetic number, because the mean of its divisors is an integer number (4158000).

Almost surely, 2^57163640 is an apocalyptic number.

It is an amenable number.

57163640 is an abundant number, since it is smaller than the sum of its proper divisors (75892360).

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

57163640 is a wasteful number, since it uses less digits than its factorization.

57163640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49319 (or 49315 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 57163640 is about 7560.6639920049. The cubic root of 57163640 is about 385.2180470584.

The spelling of 57163640 in words is "fifty-seven million, one hundred sixty-three thousand, six hundred forty".