139840280 has 16 divisors (see below), whose sum is σ = 314640720. Its totient is φ = 55936096.

The previous prime is 139840277. The next prime is 139840297. The reversal of 139840280 is 82048931.

It is a happy number.

139840280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 139840280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747964 + ... + 1748043.

It is an arithmetic number, because the mean of its divisors is an integer number (19665045).

Almost surely, 2^139840280 is an apocalyptic number.

139840280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139840280 is an abundant number, since it is smaller than the sum of its proper divisors (174800440).

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

139840280 is a wasteful number, since it uses less digits than its factorization.

139840280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496018 (or 3496014 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 139840280 is about 11825.4082381963. The cubic root of 139840280 is about 519.0518719122.

The spelling of 139840280 in words is "one hundred thirty-nine million, eight hundred forty thousand, two hundred eighty".