139449768 has 16 divisors (see below), whose sum is σ = 348624480. Its totient is φ = 46483248.

The previous prime is 139449763. The next prime is 139449769. The reversal of 139449768 is 867944931.

139449768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 139449768.

It is not an unprimeable number, because it can be changed into a prime (139449763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2905180 + ... + 2905227.

It is an arithmetic number, because the mean of its divisors is an integer number (21789030).

Almost surely, 2^139449768 is an apocalyptic number.

It is an amenable number.

139449768 is an abundant number, since it is smaller than the sum of its proper divisors (209174712).

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

139449768 is a wasteful number, since it uses less digits than its factorization.

139449768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810416 (or 5810412 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 139449768 is about 11808.8851294269. The cubic root of 139449768 is about 518.5682607574.

The spelling of 139449768 in words is "one hundred thirty-nine million, four hundred forty-nine thousand, seven hundred sixty-eight".