139745772 has 36 divisors (see below), whose sum is σ = 357509880. Its totient is φ = 46019712.

The previous prime is 139745761. The next prime is 139745773. The reversal of 139745772 is 277547931.

139745772 is a `hidden beast` number, since 1 + 3 + 9 + 74 + 577 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (139745773) 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 11 ways as a sum of consecutive naturals, for example, 20397 + ... + 26372.

It is an arithmetic number, because the mean of its divisors is an integer number (9930830).

Almost surely, 2^139745772 is an apocalyptic number.

139745772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139745772 is an abundant number, since it is smaller than the sum of its proper divisors (217764108).

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

139745772 is a wasteful number, since it uses less digits than its factorization.

139745772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46862 (or 46857 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 139745772 is about 11821.4115908380. The cubic root of 139745772 is about 518.9349156026.

The spelling of 139745772 in words is "one hundred thirty-nine million, seven hundred forty-five thousand, seven hundred seventy-two".