139124644 has 12 divisors (see below), whose sum is σ = 249406668. Its totient is φ = 67865600.

The previous prime is 139124639. The next prime is 139124647. The reversal of 139124644 is 446421931.

139124644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28622500 + 110502144 = 5350^2 + 10512^2 .

It is not an unprimeable number, because it can be changed into a prime (139124647) 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, 423997 + ... + 424324.

It is an arithmetic number, because the mean of its divisors is an integer number (20783889).

Almost surely, 2^139124644 is an apocalyptic number.

It is an amenable number.

139124644 is a deficient number, since it is larger than the sum of its proper divisors (110282024).

139124644 is a wasteful number, since it uses less digits than its factorization.

139124644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848366 (or 848364 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 139124644 is about 11795.1110210968. Note that the first 3 decimals coincide. The cubic root of 139124644 is about 518.1649370663.

The spelling of 139124644 in words is "one hundred thirty-nine million, one hundred twenty-four thousand, six hundred forty-four".