138609310 has 32 divisors (see below), whose sum is σ = 290526912. Its totient is φ = 46625280.

The previous prime is 138609283. The next prime is 138609323. The reversal of 138609310 is 13906831.

It is a super-2 number, since 2×138609310² = 38425081637352200, 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 15 ways as a sum of consecutive naturals, for example, 14971 + ... + 22390.

It is an arithmetic number, because the mean of its divisors is an integer number (9078966).

Almost surely, 2^138609310 is an apocalyptic number.

138609310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138609310 is an abundant number, since it is smaller than the sum of its proper divisors (151917602).

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

138609310 is a wasteful number, since it uses less digits than its factorization.

138609310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37428.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 138609310 is about 11773.2455168488. The cubic root of 138609310 is about 517.5243642601.

The spelling of 138609310 in words is "one hundred thirty-eight million, six hundred nine thousand, three hundred ten".