139868220 has 48 divisors (see below), whose sum is σ = 401190048. Its totient is φ = 36387840.

The previous prime is 139868171. The next prime is 139868233. The reversal of 139868220 is 22868931.

It is a happy number.

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, 25969 + ... + 30888.

It is an arithmetic number, because the mean of its divisors is an integer number (8358126).

Almost surely, 2^139868220 is an apocalyptic number.

139868220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139868220 is an abundant number, since it is smaller than the sum of its proper divisors (261321828).

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

139868220 is a wasteful number, since it uses less digits than its factorization.

139868220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56910 (or 56908 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 139868220 is about 11826.5895337582. The cubic root of 139868220 is about 519.0864383561.

The spelling of 139868220 in words is "one hundred thirty-nine million, eight hundred sixty-eight thousand, two hundred twenty".