57491688 has 128 divisors (see below), whose sum is σ = 162518400. Its totient is φ = 16859136.

The previous prime is 57491683. The next prime is 57491713. The reversal of 57491688 is 88619475.

It is not an unprimeable number, because it can be changed into a prime (57491683) 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, 508720 + ... + 508832.

It is an arithmetic number, because the mean of its divisors is an integer number (1269675).

Almost surely, 2^57491688 is an apocalyptic number.

57491688 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57491688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81259200).

57491688 is an abundant number, since it is smaller than the sum of its proper divisors (105026712).

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

57491688 is a wasteful number, since it uses less digits than its factorization.

57491688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 207 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 57491688 is about 7582.3273471936. The cubic root of 57491688 is about 385.9535323089.

The spelling of 57491688 in words is "fifty-seven million, four hundred ninety-one thousand, six hundred eighty-eight".