139784880 has 80 divisors (see below), whose sum is σ = 458836704. Its totient is φ = 35082240.

The previous prime is 139784837. The next prime is 139784899. The reversal of 139784880 is 88487931.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×139784880² = 39079625353228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 13051 + ... + 21210.

Almost surely, 2^139784880 is an apocalyptic number.

139784880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139784880 is an abundant number, since it is smaller than the sum of its proper divisors (319051824).

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

139784880 is a wasteful number, since it uses less digits than its factorization.

139784880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34294 (or 34288 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 139784880 is about 11823.0655923073. The cubic root of 139784880 is about 518.9833192466.

The spelling of 139784880 in words is "one hundred thirty-nine million, seven hundred eighty-four thousand, eight hundred eighty".