139949568 has 180 divisors, whose sum is σ = 445729284. Its totient is φ = 42240000.

The previous prime is 139949567. The next prime is 139949581. The reversal of 139949568 is 865949931.

139949568 is a `hidden beast` number, since 1 + 3 + 99 + 495 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139949567) 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 17 ways as a sum of consecutive naturals, for example, 557443 + ... + 557693.

Almost surely, 2^139949568 is an apocalyptic number.

139949568 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 139949568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222864642).

139949568 is an abundant number, since it is smaller than the sum of its proper divisors (305779716).

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

139949568 is a wasteful number, since it uses less digits than its factorization.

139949568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 267 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 139949568 is about 11830.0282332715. The cubic root of 139949568 is about 519.1870532058.

The spelling of 139949568 in words is "one hundred thirty-nine million, nine hundred forty-nine thousand, five hundred sixty-eight".