57451890 has 32 divisors (see below), whose sum is σ = 138165120. Its totient is φ = 15289344.

The previous prime is 57451859. The next prime is 57451937. The reversal of 57451890 is 9815475.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15651 + ... + 18969.

It is an arithmetic number, because the mean of its divisors is an integer number (4317660).

Almost surely, 2^57451890 is an apocalyptic number.

57451890 is an abundant number, since it is smaller than the sum of its proper divisors (80713230).

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

57451890 is a wasteful number, since it uses less digits than its factorization.

57451890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 57451890 is about 7579.7025007582. The cubic root of 57451890 is about 385.8644543634.

The spelling of 57451890 in words is "fifty-seven million, four hundred fifty-one thousand, eight hundred ninety".