57723440 has 40 divisors (see below), whose sum is σ = 134589600. Its totient is φ = 23023616.

The previous prime is 57723437. The next prime is 57723467. The reversal of 57723440 is 4432775.

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

It is a junction number, because it is equal to n+sod(n) for n = 57723397 and 57723406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35117 + ... + 36723.

It is an arithmetic number, because the mean of its divisors is an integer number (3364740).

Almost surely, 2^57723440 is an apocalyptic number.

It is an amenable number.

57723440 is an abundant number, since it is smaller than the sum of its proper divisors (76866160).

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

57723440 is a wasteful number, since it uses less digits than its factorization.

57723440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2063 counting only the distinct ones).

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

The square root of 57723440 is about 7597.5943561104. The cubic root of 57723440 is about 386.4714366533.

The spelling of 57723440 in words is "fifty-seven million, seven hundred twenty-three thousand, four hundred forty".