57440438 has 8 divisors (see below), whose sum is σ = 93993480. Its totient is φ = 26109280.

The previous prime is 57440437. The next prime is 57440441. The reversal of 57440438 is 83404475.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 57440398 and 57440407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57440431) 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, 1305443 + ... + 1305486.

It is an arithmetic number, because the mean of its divisors is an integer number (11749185).

Almost surely, 2^57440438 is an apocalyptic number.

57440438 is a deficient number, since it is larger than the sum of its proper divisors (36553042).

57440438 is a wasteful number, since it uses less digits than its factorization.

57440438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610942.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 57440438 is about 7578.9470244883. The cubic root of 57440438 is about 385.8388142822.

The spelling of 57440438 in words is "fifty-seven million, four hundred forty thousand, four hundred thirty-eight".