139189660 has 24 divisors (see below), whose sum is σ = 297815616. Its totient is φ = 54624960.

The previous prime is 139189643. The next prime is 139189679. The reversal of 139189660 is 66981931.

It is a super-2 number, since 2×139189660² = 38747522901831200, 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, 64596 + ... + 66715.

It is an arithmetic number, because the mean of its divisors is an integer number (12408984).

Almost surely, 2^139189660 is an apocalyptic number.

139189660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139189660 is an abundant number, since it is smaller than the sum of its proper divisors (158625956).

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

139189660 is a wasteful number, since it uses less digits than its factorization.

139189660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131373 (or 131371 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 139189660 is about 11797.8667563251. The cubic root of 139189660 is about 518.2456411124.

The spelling of 139189660 in words is "one hundred thirty-nine million, one hundred eighty-nine thousand, six hundred sixty".