139385280 has 56 divisors (see below), whose sum is σ = 442551312. Its totient is φ = 37169152.

The previous prime is 139385263. The next prime is 139385287. The reversal of 139385280 is 82583931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139385287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71637 + ... + 73556.

It is an arithmetic number, because the mean of its divisors is an integer number (7902702).

Almost surely, 2^139385280 is an apocalyptic number.

139385280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139385280 is an abundant number, since it is smaller than the sum of its proper divisors (303166032).

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

139385280 is a wasteful number, since it uses less digits than its factorization.

139385280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145213 (or 145203 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 139385280 is about 11806.1543272990. The cubic root of 139385280 is about 518.4883118105.

The spelling of 139385280 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, two hundred eighty".