139500660 has 96 divisors (see below), whose sum is σ = 442834560. Its totient is φ = 32527872.

The previous prime is 139500583. The next prime is 139500671. The reversal of 139500660 is 66005931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 10114 + ... + 19526.

It is an arithmetic number, because the mean of its divisors is an integer number (4612860).

Almost surely, 2^139500660 is an apocalyptic number.

139500660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139500660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221417280).

139500660 is an abundant number, since it is smaller than the sum of its proper divisors (303333900).

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

139500660 is a wasteful number, since it uses less digits than its factorization.

139500660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 139500660 is about 11811.0397510126. The cubic root of 139500660 is about 518.6313366747.

The spelling of 139500660 in words is "one hundred thirty-nine million, five hundred thousand, six hundred sixty".