138353670 has 160 divisors (see below), whose sum is σ = 458111808. Its totient is φ = 29175552.

The previous prime is 138353669. The next prime is 138353711. The reversal of 138353670 is 76353831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 72772 + ... + 74648.

Almost surely, 2^138353670 is an apocalyptic number.

138353670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138353670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229055904).

138353670 is an abundant number, since it is smaller than the sum of its proper divisors (319758138).

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

138353670 is a wasteful number, since it uses less digits than its factorization.

138353670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 138353670 is about 11762.3836869913. The cubic root of 138353670 is about 517.2060081881.

The spelling of 138353670 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, six hundred seventy".