138313910 has 32 divisors (see below), whose sum is σ = 291477312. Its totient is φ = 46264320.

The previous prime is 138313883. The next prime is 138313913. The reversal of 138313910 is 19313831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138313913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21227 + ... + 26966.

It is an arithmetic number, because the mean of its divisors is an integer number (9108666).

Almost surely, 2^138313910 is an apocalyptic number.

138313910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138313910 is an abundant number, since it is smaller than the sum of its proper divisors (153163402).

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

138313910 is a wasteful number, since it uses less digits than its factorization.

138313910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48248.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 138313910 is about 11760.6934319367. The cubic root of 138313910 is about 517.1564586506.

The spelling of 138313910 in words is "one hundred thirty-eight million, three hundred thirteen thousand, nine hundred ten".