137720438 has 16 divisors (see below), whose sum is σ = 212537040. Its totient is φ = 66881376.

The previous prime is 137720419. The next prime is 137720477. The reversal of 137720438 is 834027731.

137720438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 137720398 and 137720407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52973 + ... + 55511.

It is an arithmetic number, because the mean of its divisors is an integer number (13283565).

Almost surely, 2^137720438 is an apocalyptic number.

137720438 is a deficient number, since it is larger than the sum of its proper divisors (74816602).

137720438 is a wasteful number, since it uses less digits than its factorization.

137720438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 137720438 is about 11735.4351431892. The cubic root of 137720438 is about 516.4157332053.

The spelling of 137720438 in words is "one hundred thirty-seven million, seven hundred twenty thousand, four hundred thirty-eight".