57389994 has 48 divisors (see below), whose sum is σ = 138602880. Its totient is φ = 17055360.

The previous prime is 57389987. The next prime is 57389999. The reversal of 57389994 is 49998375.

It is a super-2 number, since 2×57389994² = 6587222822640072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57389994.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57389999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 879 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (2887560).

Almost surely, 2^57389994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57389994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69301440).

57389994 is an abundant number, since it is smaller than the sum of its proper divisors (81212886).

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

57389994 is a wasteful number, since it uses less digits than its factorization.

57389994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9915 (or 9912 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 57389994 is about 7575.6183906002. The cubic root of 57389994 is about 385.7258337518.

The spelling of 57389994 in words is "fifty-seven million, three hundred eighty-nine thousand, nine hundred ninety-four".