139240756 has 24 divisors (see below), whose sum is σ = 252068544. Its totient is φ = 67254720.

The previous prime is 139240753. The next prime is 139240757. The reversal of 139240756 is 657042931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139240753) 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 7 ways as a sum of consecutive naturals, for example, 12771 + ... + 21013.

It is an arithmetic number, because the mean of its divisors is an integer number (10502856).

Almost surely, 2^139240756 is an apocalyptic number.

It is an amenable number.

139240756 is a deficient number, since it is larger than the sum of its proper divisors (112827788).

139240756 is a wasteful number, since it uses less digits than its factorization.

139240756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8391 (or 8389 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 139240756 is about 11800.0320338548. The cubic root of 139240756 is about 518.3090486952.

The spelling of 139240756 in words is "one hundred thirty-nine million, two hundred forty thousand, seven hundred fifty-six".