57394890 has 192 divisors, whose sum is σ = 189236736. Its totient is φ = 11759616.

The previous prime is 57394889. The next prime is 57394903. The reversal of 57394890 is 9849375.

It is a super-2 number, since 2×57394890² = 6588346796224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246214 + ... + 246446.

It is an arithmetic number, because the mean of its divisors is an integer number (985608).

Almost surely, 2^57394890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57394890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94618368).

57394890 is an abundant number, since it is smaller than the sum of its proper divisors (131841846).

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

57394890 is a wasteful number, since it uses less digits than its factorization.

57394890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 57394890 is about 7575.9415256455. The cubic root of 57394890 is about 385.7368023304.

The spelling of 57394890 in words is "fifty-seven million, three hundred ninety-four thousand, eight hundred ninety".