139780620 has 96 divisors (see below), whose sum is σ = 497011200. Its totient is φ = 31948992.

The previous prime is 139780607. The next prime is 139780621. The reversal of 139780620 is 26087931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139780621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14710 + ... + 22269.

It is an arithmetic number, because the mean of its divisors is an integer number (5177200).

Almost surely, 2^139780620 is an apocalyptic number.

139780620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139780620 is an abundant number, since it is smaller than the sum of its proper divisors (357230580).

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

139780620 is a wasteful number, since it uses less digits than its factorization.

139780620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37004 (or 36996 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 139780620 is about 11822.8854346137. The cubic root of 139780620 is about 518.9780471185.

The spelling of 139780620 in words is "one hundred thirty-nine million, seven hundred eighty thousand, six hundred twenty".