139797660 has 24 divisors (see below), whose sum is σ = 391433616. Its totient is φ = 37279360.

The previous prime is 139797643. The next prime is 139797673. The reversal of 139797660 is 66797931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164921 + ... + 1165040.

It is an arithmetic number, because the mean of its divisors is an integer number (16309734).

Almost surely, 2^139797660 is an apocalyptic number.

139797660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139797660 is an abundant number, since it is smaller than the sum of its proper divisors (251635956).

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

139797660 is a wasteful number, since it uses less digits than its factorization.

139797660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329973 (or 2329971 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 139797660 is about 11823.6060489176. The cubic root of 139797660 is about 518.9991349884. Note that the first 3 decimals are identical.

The spelling of 139797660 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, six hundred sixty".