139625730 has 96 divisors (see below), whose sum is σ = 376009920. Its totient is φ = 35925120.

The previous prime is 139625729. The next prime is 139625747. The reversal of 139625730 is 37526931.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 421665 + ... + 421995.

It is an arithmetic number, because the mean of its divisors is an integer number (3916770).

Almost surely, 2^139625730 is an apocalyptic number.

139625730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139625730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188004960).

139625730 is an abundant number, since it is smaller than the sum of its proper divisors (236384190).

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

139625730 is a wasteful number, since it uses less digits than its factorization.

139625730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 139625730 is about 11816.3331875840. Note that the first 3 decimals coincide. The cubic root of 139625730 is about 518.7862841993.

The spelling of 139625730 in words is "one hundred thirty-nine million, six hundred twenty-five thousand, seven hundred thirty".