169988920 has 16 divisors (see below), whose sum is σ = 382475160. Its totient is φ = 67995552.

The previous prime is 169988893. The next prime is 169988939. The reversal of 169988920 is 29889961.

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, 2124822 + ... + 2124901.

Almost surely, 2^169988920 is an apocalyptic number.

169988920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169988920 is an abundant number, since it is smaller than the sum of its proper divisors (212486240).

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

169988920 is a wasteful number, since it uses less digits than its factorization.

169988920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249734 (or 4249730 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 169988920 is about 13037.9799048779. The cubic root of 169988920 is about 553.9537902349.

The spelling of 169988920 in words is "one hundred sixty-nine million, nine hundred eighty-eight thousand, nine hundred twenty".