137807988 has 48 divisors (see below), whose sum is σ = 339440640. Its totient is φ = 43394400.

The previous prime is 137807987. The next prime is 137808031. The reversal of 137807988 is 889708731.

It is a self number, because there is not a number n which added to its sum of digits gives 137807988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137807987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111333 + ... + 112563.

It is an arithmetic number, because the mean of its divisors is an integer number (7071680).

Almost surely, 2^137807988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137807988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169720320).

137807988 is an abundant number, since it is smaller than the sum of its proper divisors (201632652).

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

137807988 is a wasteful number, since it uses less digits than its factorization.

137807988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 137807988 is about 11739.1647062302. The cubic root of 137807988 is about 516.5251399158.

The spelling of 137807988 in words is "one hundred thirty-seven million, eight hundred seven thousand, nine hundred eighty-eight".