139157780 has 24 divisors (see below), whose sum is σ = 294967008. Its totient is φ = 55142048.

The previous prime is 139157773. The next prime is 139157803. The reversal of 139157780 is 87751931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30374 + ... + 34653.

It is an arithmetic number, because the mean of its divisors is an integer number (12290292).

Almost surely, 2^139157780 is an apocalyptic number.

139157780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139157780 is an abundant number, since it is smaller than the sum of its proper divisors (155809228).

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

139157780 is a wasteful number, since it uses less digits than its factorization.

139157780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65143 (or 65141 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 139157780 is about 11796.5155872402. The cubic root of 139157780 is about 518.2060717637.

The spelling of 139157780 in words is "one hundred thirty-nine million, one hundred fifty-seven thousand, seven hundred eighty".