139865720 has 32 divisors (see below), whose sum is σ = 315176400. Its totient is φ = 55861248.

The previous prime is 139865711. The next prime is 139865723. The reversal of 139865720 is 27568931.

It is a super-2 number, since 2×139865720² = 39124839262236800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139865723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28487 + ... + 33033.

Almost surely, 2^139865720 is an apocalyptic number.

139865720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139865720 is an abundant number, since it is smaller than the sum of its proper divisors (175310680).

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

139865720 is a wasteful number, since it uses less digits than its factorization.

139865720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327 (or 5323 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 139865720 is about 11826.4838392482. The cubic root of 139865720 is about 519.0833456263.

The spelling of 139865720 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, seven hundred twenty".