138310770 has 32 divisors (see below), whose sum is σ = 357481152. Its totient is φ = 34045632.

The previous prime is 138310723. The next prime is 138310787. The reversal of 138310770 is 77013831.

138310770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 176932 + ... + 177711.

It is an arithmetic number, because the mean of its divisors is an integer number (11171286).

Almost surely, 2^138310770 is an apocalyptic number.

138310770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138310770 is an abundant number, since it is smaller than the sum of its proper divisors (219170382).

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

138310770 is a wasteful number, since it uses less digits than its factorization.

138310770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354666.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 138310770 is about 11760.5599356493. The cubic root of 138310770 is about 517.1525451286.

The spelling of 138310770 in words is "one hundred thirty-eight million, three hundred ten thousand, seven hundred seventy".