57947440 has 40 divisors (see below), whose sum is σ = 137022480. Its totient is φ = 22784256.

The previous prime is 57947399. The next prime is 57947443. The reversal of 57947440 is 4474975.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 57947393 and 57947402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57947443) 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, 1419 + ... + 10858.

It is an arithmetic number, because the mean of its divisors is an integer number (3425562).

Almost surely, 2^57947440 is an apocalyptic number.

It is an amenable number.

57947440 is an abundant number, since it is smaller than the sum of its proper divisors (79075040).

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

57947440 is a wasteful number, since it uses less digits than its factorization.

57947440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12349 (or 12343 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 57947440 is about 7612.3215906844. The cubic root of 57947440 is about 386.9707015547.

The spelling of 57947440 in words is "fifty-seven million, nine hundred forty-seven thousand, four hundred forty".