139565980 has 24 divisors (see below), whose sum is σ = 303196320. Its totient is φ = 53901120.

The previous prime is 139565953. The next prime is 139566041. The reversal of 139565980 is 89565931.

It is a self number, because there is not a number n which added to its sum of digits gives 139565980.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119736 + ... + 120895.

It is an arithmetic number, because the mean of its divisors is an integer number (12633180).

Almost surely, 2^139565980 is an apocalyptic number.

139565980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139565980 is an abundant number, since it is smaller than the sum of its proper divisors (163630340).

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

139565980 is a wasteful number, since it uses less digits than its factorization.

139565980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240669 (or 240667 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 139565980 is about 11813.8046369491. The cubic root of 139565980 is about 518.7122722840.

The spelling of 139565980 in words is "one hundred thirty-nine million, five hundred sixty-five thousand, nine hundred eighty".