139305320 has 128 divisors (see below), whose sum is σ = 403660800. Its totient is φ = 41990400.

The previous prime is 139305281. The next prime is 139305323. The reversal of 139305320 is 23503931.

It is a self number, because there is not a number n which added to its sum of digits gives 139305320.

It is not an unprimeable number, because it can be changed into a prime (139305323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94751 + ... + 96209.

It is an arithmetic number, because the mean of its divisors is an integer number (3153600).

Almost surely, 2^139305320 is an apocalyptic number.

139305320 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 139305320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201830400).

139305320 is an abundant number, since it is smaller than the sum of its proper divisors (264355480).

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

139305320 is a wasteful number, since it uses less digits than its factorization.

139305320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 139305320 is about 11802.7674720804. The cubic root of 139305320 is about 518.3891472128.

The spelling of 139305320 in words is "one hundred thirty-nine million, three hundred five thousand, three hundred twenty".