139973720 has 64 divisors (see below), whose sum is σ = 330847200. Its totient is φ = 53222400.

The previous prime is 139973719. The next prime is 139973723. The reversal of 139973720 is 27379931.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139973723) 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 15 ways as a sum of consecutive naturals, for example, 76820 + ... + 78620.

Almost surely, 2^139973720 is an apocalyptic number.

139973720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139973720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165423600).

139973720 is an abundant number, since it is smaller than the sum of its proper divisors (190873480).

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

139973720 is a wasteful number, since it uses less digits than its factorization.

139973720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 139973720 is about 11831.0489813879. The cubic root of 139973720 is about 519.2169179746.

The spelling of 139973720 in words is "one hundred thirty-nine million, nine hundred seventy-three thousand, seven hundred twenty".