137988920 has 16 divisors (see below), whose sum is σ = 310475160. Its totient is φ = 55195552.

The previous prime is 137988919. The next prime is 137988953. The reversal of 137988920 is 29889731.

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, 1724822 + ... + 1724901.

Almost surely, 2^137988920 is an apocalyptic number.

137988920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137988920 is an abundant number, since it is smaller than the sum of its proper divisors (172486240).

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

137988920 is a wasteful number, since it uses less digits than its factorization.

137988920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449734 (or 3449730 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 137988920 is about 11746.8685188862. The cubic root of 137988920 is about 516.7510945392.

The spelling of 137988920 in words is "one hundred thirty-seven million, nine hundred eighty-eight thousand, nine hundred twenty".