57724540 has 12 divisors (see below), whose sum is σ = 121221576. Its totient is φ = 23089808.

The previous prime is 57724519. The next prime is 57724543. The reversal of 57724540 is 4542775.

It is a junction number, because it is equal to n+sod(n) for n = 57724496 and 57724505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57724543) 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, 1443094 + ... + 1443133.

It is an arithmetic number, because the mean of its divisors is an integer number (10101798).

Almost surely, 2^57724540 is an apocalyptic number.

It is an amenable number.

57724540 is an abundant number, since it is smaller than the sum of its proper divisors (63497036).

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

57724540 is a wasteful number, since it uses less digits than its factorization.

57724540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886236 (or 2886234 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 57724540 is about 7597.6667471007. Note that the first 3 decimals coincide. The cubic root of 57724540 is about 386.4738915537.

The spelling of 57724540 in words is "fifty-seven million, seven hundred twenty-four thousand, five hundred forty".