139689210 has 32 divisors (see below), whose sum is σ = 335751552. Its totient is φ = 37195200.

The previous prime is 139689203. The next prime is 139689211. The reversal of 139689210 is 12986931.

It is not an unprimeable number, because it can be changed into a prime (139689211) 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, 19635 + ... + 25785.

It is an arithmetic number, because the mean of its divisors is an integer number (10492236).

Almost surely, 2^139689210 is an apocalyptic number.

139689210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139689210 is an abundant number, since it is smaller than the sum of its proper divisors (196062342).

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

139689210 is a wasteful number, since it uses less digits than its factorization.

139689210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6918.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 139689210 is about 11819.0189948236. The cubic root of 139689210 is about 518.8648933108.

The spelling of 139689210 in words is "one hundred thirty-nine million, six hundred eighty-nine thousand, two hundred ten".