138359930 has 16 divisors (see below), whose sum is σ = 249596424. Its totient is φ = 55222080.

The previous prime is 138359929. The next prime is 138359933. The reversal of 138359930 is 39953831.

It can be written as a sum of positive squares in 4 ways, for example, as 47596201 + 90763729 = 6899^2 + 9527^2 .

It is not an unprimeable number, because it can be changed into a prime (138359933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10397 + ... + 19616.

Almost surely, 2^138359930 is an apocalyptic number.

138359930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138359930 is a deficient number, since it is larger than the sum of its proper divisors (111236494).

138359930 is a wasteful number, since it uses less digits than its factorization.

138359930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30481.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 138359930 is about 11762.6497865064. The cubic root of 138359930 is about 517.2138086336.

The spelling of 138359930 in words is "one hundred thirty-eight million, three hundred fifty-nine thousand, nine hundred thirty".