139856380 has 24 divisors (see below), whose sum is σ = 297002160. Its totient is φ = 55313280.

The previous prime is 139856341. The next prime is 139856419. The reversal of 139856380 is 83658931.

It is an interprime number because it is at equal distance from previous prime (139856341) and next prime (139856419).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37506 + ... + 41065.

It is an arithmetic number, because the mean of its divisors is an integer number (12375090).

Almost surely, 2^139856380 is an apocalyptic number.

139856380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139856380 is an abundant number, since it is smaller than the sum of its proper divisors (157145780).

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

139856380 is a wasteful number, since it uses less digits than its factorization.

139856380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78669 (or 78667 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 139856380 is about 11826.0889562019. The cubic root of 139856380 is about 519.0717908618.

The spelling of 139856380 in words is "one hundred thirty-nine million, eight hundred fifty-six thousand, three hundred eighty".