102857638 has 16 divisors (see below), whose sum is σ = 167156640. Its totient is φ = 47186496.

The previous prime is 102857611. The next prime is 102857641. The reversal of 102857638 is 836758201.

It is a self number, because there is not a number n which added to its sum of digits gives 102857638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7503 + ... + 16186.

It is an arithmetic number, because the mean of its divisors is an integer number (10447290).

Almost surely, 2^102857638 is an apocalyptic number.

102857638 is a deficient number, since it is larger than the sum of its proper divisors (64299002).

102857638 is a wasteful number, since it uses less digits than its factorization.

102857638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23871.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 102857638 is about 10141.8754675849. The cubic root of 102857638 is about 468.5387512002.

The spelling of 102857638 in words is "one hundred two million, eight hundred fifty-seven thousand, six hundred thirty-eight".