139908540 has 48 divisors (see below), whose sum is σ = 408780288. Its totient is φ = 35686464.

The previous prime is 139908539. The next prime is 139908569. The reversal of 139908540 is 45809931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49312 + ... + 52071.

It is an arithmetic number, because the mean of its divisors is an integer number (8516256).

Almost surely, 2^139908540 is an apocalyptic number.

139908540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139908540 is an abundant number, since it is smaller than the sum of its proper divisors (268871748).

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

139908540 is a wasteful number, since it uses less digits than its factorization.

139908540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101418 (or 101416 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 139908540 is about 11828.2940443667. The cubic root of 139908540 is about 519.1363128126.

The spelling of 139908540 in words is "one hundred thirty-nine million, nine hundred eight thousand, five hundred forty".