100438988 has 12 divisors (see below), whose sum is σ = 189288960. Its totient is φ = 46356432.

The previous prime is 100438981. The next prime is 100438991. The reversal of 100438988 is 889834001.

It is not an unprimeable number, because it can be changed into a prime (100438981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965708 + ... + 965811.

It is an arithmetic number, because the mean of its divisors is an integer number (15774080).

Almost surely, 2^100438988 is an apocalyptic number.

It is an amenable number.

100438988 is a deficient number, since it is larger than the sum of its proper divisors (88849972).

100438988 is a wasteful number, since it uses less digits than its factorization.

100438988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931536 (or 1931534 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 100438988 is about 10021.9253639208. The cubic root of 100438988 is about 464.8370925080.

The spelling of 100438988 in words is "one hundred million, four hundred thirty-eight thousand, nine hundred eighty-eight".