57639402 has 24 divisors (see below), whose sum is σ = 126056736. Its totient is φ = 19032936.

The previous prime is 57639397. The next prime is 57639409. The reversal of 57639402 is 20493675.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57639409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13038 + ... + 16889.

It is an arithmetic number, because the mean of its divisors is an integer number (5252364).

Almost surely, 2^57639402 is an apocalyptic number.

57639402 is an abundant number, since it is smaller than the sum of its proper divisors (68417334).

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

57639402 is a wasteful number, since it uses less digits than its factorization.

57639402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30042 (or 30039 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 57639402 is about 7592.0617753019. The cubic root of 57639402 is about 386.2837944478.

The spelling of 57639402 in words is "fifty-seven million, six hundred thirty-nine thousand, four hundred two".