138266930 has 32 divisors (see below), whose sum is σ = 259516224. Its totient is φ = 52992576.

The previous prime is 138266927. The next prime is 138266941. The reversal of 138266930 is 39662831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19757 + ... + 25823.

It is an arithmetic number, because the mean of its divisors is an integer number (8109882).

Almost surely, 2^138266930 is an apocalyptic number.

138266930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138266930 is a deficient number, since it is larger than the sum of its proper divisors (121249294).

138266930 is a wasteful number, since it uses less digits than its factorization.

138266930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 138266930 is about 11758.6959310971. The cubic root of 138266930 is about 517.0978991951.

The spelling of 138266930 in words is "one hundred thirty-eight million, two hundred sixty-six thousand, nine hundred thirty".