138870330 has 32 divisors (see below), whose sum is σ = 334736064. Its totient is φ = 36871296.

The previous prime is 138870323. The next prime is 138870337. The reversal of 138870330 is 33078831.

It is an interprime number because it is at equal distance from previous prime (138870323) and next prime (138870337).

It is a junction number, because it is equal to n+sod(n) for n = 138870291 and 138870300.

It is not an unprimeable number, because it can be changed into a prime (138870337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944 + ... + 16923.

It is an arithmetic number, because the mean of its divisors is an integer number (10460502).

Almost surely, 2^138870330 is an apocalyptic number.

138870330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138870330 is an abundant number, since it is smaller than the sum of its proper divisors (195865734).

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

138870330 is a wasteful number, since it uses less digits than its factorization.

138870330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20110.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 138870330 is about 11784.3256064995. The cubic root of 138870330 is about 517.8490165850.

The spelling of 138870330 in words is "one hundred thirty-eight million, eight hundred seventy thousand, three hundred thirty".