138733770 has 64 divisors (see below), whose sum is σ = 402921216. Its totient is φ = 29844480.

The previous prime is 138733741. The next prime is 138733849. The reversal of 138733770 is 77337831.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15861 + ... + 23000.

It is an arithmetic number, because the mean of its divisors is an integer number (6295644).

Almost surely, 2^138733770 is an apocalyptic number.

138733770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138733770 is an abundant number, since it is smaller than the sum of its proper divisors (264187446).

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

138733770 is a wasteful number, since it uses less digits than its factorization.

138733770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38895.

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 138733770 is about 11778.5300441099. The cubic root of 138733770 is about 517.6792163243.

The spelling of 138733770 in words is "one hundred thirty-eight million, seven hundred thirty-three thousand, seven hundred seventy".