139481568 has 96 divisors (see below), whose sum is σ = 424569600. Its totient is φ = 44466048.

The previous prime is 139481567. The next prime is 139481579. The reversal of 139481568 is 865184931.

139481568 is a `hidden beast` number, since 1 + 3 + 9 + 4 + 81 + 568 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139481567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16363 + ... + 23381.

It is an arithmetic number, because the mean of its divisors is an integer number (4422600).

Almost surely, 2^139481568 is an apocalyptic number.

139481568 is a gapful number since it is divisible by the number (18) 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 139481568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212284800).

139481568 is an abundant number, since it is smaller than the sum of its proper divisors (285088032).

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

139481568 is a wasteful number, since it uses less digits than its factorization.

139481568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7061 (or 7047 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 139481568 is about 11810.2314964610. The cubic root of 139481568 is about 518.6076757085.

The spelling of 139481568 in words is "one hundred thirty-nine million, four hundred eighty-one thousand, five hundred sixty-eight".