57643650 has 120 divisors (see below), whose sum is σ = 164383824. Its totient is φ = 14968800.

The previous prime is 57643643. The next prime is 57643661. The reversal of 57643650 is 5634675.

57643650 is a `hidden beast` number, since 5 + 7 + 643 + 6 + 5 + 0 = 666.

57643650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 173985 + ... + 174315.

Almost surely, 2^57643650 is an apocalyptic number.

57643650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 57643650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82191912).

57643650 is an abundant number, since it is smaller than the sum of its proper divisors (106740174).

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

57643650 is a wasteful number, since it uses less digits than its factorization.

57643650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 57643650 is about 7592.3415360480. The cubic root of 57643650 is about 386.2932838665.

The spelling of 57643650 in words is "fifty-seven million, six hundred forty-three thousand, six hundred fifty".