109890172 has 12 divisors (see below), whose sum is σ = 219780400. Its totient is φ = 47095776.

The previous prime is 109890161. The next prime is 109890217. The reversal of 109890172 is 271098901.

109890172 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962297 + ... + 1962352.

Almost surely, 2^109890172 is an apocalyptic number.

It is an amenable number.

109890172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

109890172 is a wasteful number, since it uses less digits than its factorization.

109890172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924660 (or 3924658 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 109890172 is about 10482.8513296717. The cubic root of 109890172 is about 478.9824683446.

The spelling of 109890172 in words is "one hundred nine million, eight hundred ninety thousand, one hundred seventy-two".