139248720 has 480 divisors, whose sum is σ = 568713600. Its totient is φ = 31352832.

The previous prime is 139248719. The next prime is 139248757. The reversal of 139248720 is 27842931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4801666 + ... + 4801694.

It is an arithmetic number, because the mean of its divisors is an integer number (1184820).

Almost surely, 2^139248720 is an apocalyptic number.

139248720 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 139248720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284356800).

139248720 is an abundant number, since it is smaller than the sum of its proper divisors (429464880).

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

139248720 is a wasteful number, since it uses less digits than its factorization.

139248720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 139248720 is about 11800.3694857407. The cubic root of 139248720 is about 518.3189302238.

The spelling of 139248720 in words is "one hundred thirty-nine million, two hundred forty-eight thousand, seven hundred twenty".