139373568 has 132 divisors (see below), whose sum is σ = 418652440. Its totient is φ = 45803520.

The previous prime is 139373543. The next prime is 139373581. The reversal of 139373568 is 865373931.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

139373568 is a `hidden beast` number, since 13 + 9 + 3 + 73 + 568 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1962973 + ... + 1963043.

Almost surely, 2^139373568 is an apocalyptic number.

139373568 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 139373568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209326220).

139373568 is an abundant number, since it is smaller than the sum of its proper divisors (279278872).

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

139373568 is an frugal number, since it uses more digits than its factorization.

139373568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 76 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 139373568 is about 11805.6583043895. The cubic root of 139373568 is about 518.4737892220.

The spelling of 139373568 in words is "one hundred thirty-nine million, three hundred seventy-three thousand, five hundred sixty-eight".