139945764 has 108 divisors (see below), whose sum is σ = 394792944. Its totient is φ = 38469312.

The previous prime is 139945763. The next prime is 139945783. The reversal of 139945764 is 467549931.

Its product of digits (816480) is a multiple of the sum of its prime divisors (324).

It is not an unprimeable number, because it can be changed into a prime (139945763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 494367 + ... + 494649.

Almost surely, 2^139945764 is an apocalyptic number.

139945764 is a gapful number since it is divisible by the number (14) 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 139945764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197396472).

139945764 is an abundant number, since it is smaller than the sum of its proper divisors (254847180).

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

139945764 is a wasteful number, since it uses less digits than its factorization.

139945764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 324 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 139945764 is about 11829.8674548788. The cubic root of 139945764 is about 519.1823491174.

The spelling of 139945764 in words is "one hundred thirty-nine million, nine hundred forty-five thousand, seven hundred sixty-four".