139221744 has 40 divisors (see below), whose sum is σ = 371261952. Its totient is φ = 44909760.

The previous prime is 139221743. The next prime is 139221767. The reversal of 139221744 is 447122931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139221743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45294 + ... + 48269.

Almost surely, 2^139221744 is an apocalyptic number.

It is an amenable number.

139221744 is an abundant number, since it is smaller than the sum of its proper divisors (232040208).

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

139221744 is a wasteful number, since it uses less digits than its factorization.

139221744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93605 (or 93599 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 139221744 is about 11799.2264153206. The cubic root of 139221744 is about 518.2854575656.

The spelling of 139221744 in words is "one hundred thirty-nine million, two hundred twenty-one thousand, seven hundred forty-four".