57547640 has 64 divisors (see below), whose sum is σ = 133293600. Its totient is φ = 22353408.

The previous prime is 57547627. The next prime is 57547649. The reversal of 57547640 is 4674575.

It is a junction number, because it is equal to n+sod(n) for n = 57547594 and 57547603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57547649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292022 + ... + 292218.

Almost surely, 2^57547640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57547640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66646800).

57547640 is an abundant number, since it is smaller than the sum of its proper divisors (75745960).

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

57547640 is a wasteful number, since it uses less digits than its factorization.

57547640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 57547640 is about 7586.0160822397. The cubic root of 57547640 is about 386.0786974766.

The spelling of 57547640 in words is "fifty-seven million, five hundred forty-seven thousand, six hundred forty".