139018720 has 24 divisors (see below), whose sum is σ = 328432104. Its totient is φ = 55607424.

The previous prime is 139018717. The next prime is 139018729. The reversal of 139018720 is 27810931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139018729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434274 + ... + 434593.

It is an arithmetic number, because the mean of its divisors is an integer number (13684671).

Almost surely, 2^139018720 is an apocalyptic number.

139018720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139018720 is an abundant number, since it is smaller than the sum of its proper divisors (189413384).

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

139018720 is an equidigital number, since it uses as much as digits as its factorization.

139018720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868882 (or 868874 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 139018720 is about 11790.6200006615. The cubic root of 139018720 is about 518.0334002504.

The spelling of 139018720 in words is "one hundred thirty-nine million, eighteen thousand, seven hundred twenty".