138430930 has 32 divisors (see below), whose sum is σ = 272341440. Its totient is φ = 50243520.

The previous prime is 138430921. The next prime is 138430973. The reversal of 138430930 is 39034831.

It is a junction number, because it is equal to n+sod(n) for n = 138430892 and 138430901.

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, 86881 + ... + 88459.

It is an arithmetic number, because the mean of its divisors is an integer number (8510670).

Almost surely, 2^138430930 is an apocalyptic number.

138430930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138430930 is a deficient number, since it is larger than the sum of its proper divisors (133910510).

138430930 is a wasteful number, since it uses less digits than its factorization.

138430930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 138430930 is about 11765.6674268823. The cubic root of 138430930 is about 517.3022636770.

The spelling of 138430930 in words is "one hundred thirty-eight million, four hundred thirty thousand, nine hundred thirty".