102638660 has 24 divisors (see below), whose sum is σ = 215732160. Its totient is φ = 41019104.

The previous prime is 102638623. The next prime is 102638663. The reversal of 102638660 is 66836201.

It is not an unprimeable number, because it can be changed into a prime (102638663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40511 + ... + 42969.

It is an arithmetic number, because the mean of its divisors is an integer number (8988840).

Almost surely, 2^102638660 is an apocalyptic number.

102638660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102638660 is an abundant number, since it is smaller than the sum of its proper divisors (113093500).

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

102638660 is a wasteful number, since it uses less digits than its factorization.

102638660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555 (or 4553 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 102638660 is about 10131.0739805807. The cubic root of 102638660 is about 468.2060176068.

Subtracting from 102638660 its sum of digits (32), we obtain a triangular number (102638628 = T₁₄₃₂₇).

The spelling of 102638660 in words is "one hundred two million, six hundred thirty-eight thousand, six hundred sixty".