139449644 has 12 divisors (see below), whose sum is σ = 254647344. Its totient is φ = 66693264.

The previous prime is 139449617. The next prime is 139449649. The reversal of 139449644 is 446944931.

139449644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139449595 and 139449604.

It is not an unprimeable number, because it can be changed into a prime (139449649) 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, 757787 + ... + 757970.

It is an arithmetic number, because the mean of its divisors is an integer number (21220612).

Almost surely, 2^139449644 is an apocalyptic number.

It is an amenable number.

139449644 is a deficient number, since it is larger than the sum of its proper divisors (115197700).

139449644 is a wasteful number, since it uses less digits than its factorization.

139449644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515784 (or 1515782 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 139449644 is about 11808.8798791418. The cubic root of 139449644 is about 518.5681070521.

The spelling of 139449644 in words is "one hundred thirty-nine million, four hundred forty-nine thousand, six hundred forty-four".