139895520 has 96 divisors (see below), whose sum is σ = 452638368. Its totient is φ = 36292608.

The previous prime is 139895513. The next prime is 139895551. The reversal of 139895520 is 25598931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13822 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (4714983).

Almost surely, 2^139895520 is an apocalyptic number.

139895520 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 139895520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226319184).

139895520 is an abundant number, since it is smaller than the sum of its proper divisors (312742848).

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

139895520 is a wasteful number, since it uses less digits than its factorization.

139895520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932 (or 7924 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 139895520 is about 11827.7436563361. The cubic root of 139895520 is about 519.1202085670.

The spelling of 139895520 in words is "one hundred thirty-nine million, eight hundred ninety-five thousand, five hundred twenty".