137373728 has 24 divisors (see below), whose sum is σ = 273248892. Its totient is φ = 67977216.

The previous prime is 137373707. The next prime is 137373737. The reversal of 137373728 is 827373731.

It can be written as a sum of positive squares in 2 ways, for example, as 128777104 + 8596624 = 11348^2 + 2932^2 .

It is a super-2 number, since 2×137373728² = 37743082289235968, which contains 22 as substring.

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, 19025 + ... + 25232.

Almost surely, 2^137373728 is an apocalyptic number.

It is an amenable number.

137373728 is a deficient number, since it is larger than the sum of its proper divisors (135875164).

137373728 is an equidigital number, since it uses as much as digits as its factorization.

137373728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44364 (or 44356 counting only the distinct ones).

The product of its digits is 148176, while the sum is 41.

The square root of 137373728 is about 11720.6539066726. The cubic root of 137373728 is about 515.9820116719.

The spelling of 137373728 in words is "one hundred thirty-seven million, three hundred seventy-three thousand, seven hundred twenty-eight".