137889620 has 24 divisors (see below), whose sum is σ = 315893088. Its totient is φ = 50141600.

The previous prime is 137889617. The next prime is 137889629. The reversal of 137889620 is 26988731.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137889629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313166 + ... + 313605.

It is an arithmetic number, because the mean of its divisors is an integer number (13162212).

Almost surely, 2^137889620 is an apocalyptic number.

137889620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137889620 is an abundant number, since it is smaller than the sum of its proper divisors (178003468).

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

137889620 is a wasteful number, since it uses less digits than its factorization.

137889620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626791 (or 626789 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 137889620 is about 11742.6410998548. The cubic root of 137889620 is about 516.6271094700.

The spelling of 137889620 in words is "one hundred thirty-seven million, eight hundred eighty-nine thousand, six hundred twenty".