57308394 has 64 divisors (see below), whose sum is σ = 142611840. Its totient is φ = 15083520.

The previous prime is 57308393. The next prime is 57308399. The reversal of 57308394 is 49380375.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (57308393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12622 + ... + 16550.

It is an arithmetic number, because the mean of its divisors is an integer number (2228310).

Almost surely, 2^57308394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57308394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71305920).

57308394 is an abundant number, since it is smaller than the sum of its proper divisors (85303446).

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

57308394 is a wasteful number, since it uses less digits than its factorization.

57308394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 57308394 is about 7570.2307758747. The cubic root of 57308394 is about 385.5429321963.

The spelling of 57308394 in words is "fifty-seven million, three hundred eight thousand, three hundred ninety-four".