57207390 has 32 divisors (see below), whose sum is σ = 137496960. Its totient is φ = 15233184.

The previous prime is 57207389. The next prime is 57207391. The reversal of 57207390 is 9370275.

It is an interprime number because it is at equal distance from previous prime (57207389) and next prime (57207391).

It is a super-2 number, since 2×57207390² = 6545370941224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57207391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38481 + ... + 39939.

It is an arithmetic number, because the mean of its divisors is an integer number (4296780).

Almost surely, 2^57207390 is an apocalyptic number.

57207390 is an abundant number, since it is smaller than the sum of its proper divisors (80289570).

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

57207390 is a wasteful number, since it uses less digits than its factorization.

57207390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 57207390 is about 7563.5567030333. The cubic root of 57207390 is about 385.3162971107.

The spelling of 57207390 in words is "fifty-seven million, two hundred seven thousand, three hundred ninety".