139855680 has 112 divisors (see below), whose sum is σ = 493410240. Its totient is φ = 37292544.

The previous prime is 139855673. The next prime is 139855697. The reversal of 139855680 is 86558931.

139855680 is a `hidden beast` number, since 1 + 3 + 9 + 85 + 568 + 0 = 666.

It is a super-2 number, since 2×139855680² = 39119222456524800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 547 + ... + 16733.

Almost surely, 2^139855680 is an apocalyptic number.

139855680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139855680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246705120).

139855680 is an abundant number, since it is smaller than the sum of its proper divisors (353554560).

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

139855680 is a wasteful number, since it uses less digits than its factorization.

139855680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16213 (or 16197 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 139855680 is about 11826.0593605816. The cubic root of 139855680 is about 519.0709248523.

The spelling of 139855680 in words is "one hundred thirty-nine million, eight hundred fifty-five thousand, six hundred eighty".