138889310 has 16 divisors (see below), whose sum is σ = 285715296. Its totient is φ = 47619168.

The previous prime is 138889301. The next prime is 138889321. The reversal of 138889310 is 13988831.

It is a happy number.

It is a super-2 number, since 2×138889310² = 38580480864552200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991997 + ... + 992136.

It is an arithmetic number, because the mean of its divisors is an integer number (17857206).

Almost surely, 2^138889310 is an apocalyptic number.

138889310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138889310 is an abundant number, since it is smaller than the sum of its proper divisors (146825986).

138889310 is a wasteful number, since it uses less digits than its factorization.

138889310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984147.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 138889310 is about 11785.1308859936. The cubic root of 138889310 is about 517.8726077212.

The spelling of 138889310 in words is "one hundred thirty-eight million, eight hundred eighty-nine thousand, three hundred ten".