57040238 has 4 divisors (see below), whose sum is σ = 85560360. Its totient is φ = 28520118.

The previous prime is 57040201. The next prime is 57040289. The reversal of 57040238 is 83204075.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 57040238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260058 + ... + 14260061.

It is an arithmetic number, because the mean of its divisors is an integer number (21390090).

Almost surely, 2^57040238 is an apocalyptic number.

57040238 is a deficient number, since it is larger than the sum of its proper divisors (28520122).

57040238 is a wasteful number, since it uses less digits than its factorization.

57040238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28520121.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 57040238 is about 7552.4987917907. The cubic root of 57040238 is about 384.9406508842.

The spelling of 57040238 in words is "fifty-seven million, forty thousand, two hundred thirty-eight".