139683220 has 24 divisors (see below), whose sum is σ = 310590504. Its totient is φ = 52586496.

The previous prime is 139683157. The next prime is 139683223. The reversal of 139683220 is 22386931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19254544 + 120428676 = 4388^2 + 10974^2 .

It is a super-2 number, since 2×139683220² = 39022803899136800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139683223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205077 + ... + 205756.

It is an arithmetic number, because the mean of its divisors is an integer number (12941271).

Almost surely, 2^139683220 is an apocalyptic number.

139683220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139683220 is an abundant number, since it is smaller than the sum of its proper divisors (170907284).

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

139683220 is a wasteful number, since it uses less digits than its factorization.

139683220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410859 (or 410857 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 139683220 is about 11818.7655869807. The cubic root of 139683220 is about 518.8574767391.

The spelling of 139683220 in words is "one hundred thirty-nine million, six hundred eighty-three thousand, two hundred twenty".