139747980 has 24 divisors (see below), whose sum is σ = 391294512. Its totient is φ = 37266112.

The previous prime is 139747963. The next prime is 139747991. The reversal of 139747980 is 89747931.

139747980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 1164507 + ... + 1164626.

It is an arithmetic number, because the mean of its divisors is an integer number (16303938).

Almost surely, 2^139747980 is an apocalyptic number.

139747980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139747980 is an abundant number, since it is smaller than the sum of its proper divisors (251546532).

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

139747980 is a wasteful number, since it uses less digits than its factorization.

139747980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329145 (or 2329143 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 139747980 is about 11821.5049803314. The cubic root of 139747980 is about 518.9376486662.

The spelling of 139747980 in words is "one hundred thirty-nine million, seven hundred forty-seven thousand, nine hundred eighty".