57724340 has 12 divisors (see below), whose sum is σ = 121221156. Its totient is φ = 23089728.

The previous prime is 57724327. The next prime is 57724343. The reversal of 57724340 is 4342775.

It can be written as a sum of positive squares in 2 ways, for example, as 43375396 + 14348944 = 6586^2 + 3788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 57724297 and 57724306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57724343) 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, 1443089 + ... + 1443128.

It is an arithmetic number, because the mean of its divisors is an integer number (10101763).

Almost surely, 2^57724340 is an apocalyptic number.

It is an amenable number.

57724340 is an abundant number, since it is smaller than the sum of its proper divisors (63496816).

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

57724340 is a wasteful number, since it uses less digits than its factorization.

57724340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886226 (or 2886224 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 57724340 is about 7597.6535851538. The cubic root of 57724340 is about 386.4734452105.

The spelling of 57724340 in words is "fifty-seven million, seven hundred twenty-four thousand, three hundred forty".