139744812 has 24 divisors (see below), whose sum is σ = 329302512. Its totient is φ = 46120000.

The previous prime is 139744799. The next prime is 139744837. The reversal of 139744812 is 218447931.

It is a super-2 number, since 2×139744812² = 39057224961830688, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56439 + ... + 58862.

It is an arithmetic number, because the mean of its divisors is an integer number (13720938).

Almost surely, 2^139744812 is an apocalyptic number.

139744812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139744812 is an abundant number, since it is smaller than the sum of its proper divisors (189557700).

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

139744812 is a wasteful number, since it uses less digits than its factorization.

139744812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115409 (or 115407 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 139744812 is about 11821.3709864804. The cubic root of 139744812 is about 518.9337273050.

The spelling of 139744812 in words is "one hundred thirty-nine million, seven hundred forty-four thousand, eight hundred twelve".