102638994 has 16 divisors (see below), whose sum is σ = 205403520. Its totient is φ = 34192080.

The previous prime is 102638989. The next prime is 102639011. The reversal of 102638994 is 499836201.

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, 7959 + ... + 16389.

It is an arithmetic number, because the mean of its divisors is an integer number (12837720).

Almost surely, 2^102638994 is an apocalyptic number.

102638994 is an abundant number, since it is smaller than the sum of its proper divisors (102764526).

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

102638994 is a wasteful number, since it uses less digits than its factorization.

102638994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10465.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 102638994 is about 10131.0904645058. The cubic root of 102638994 is about 468.2065254747.

The spelling of 102638994 in words is "one hundred two million, six hundred thirty-eight thousand, nine hundred ninety-four".