139378944 has 72 divisors (see below), whose sum is σ = 374133760. Its totient is φ = 46061568.

The previous prime is 139378933. The next prime is 139378957. The reversal of 139378944 is 449873931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 139378893 and 139378902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96822 + ... + 98250.

Almost surely, 2^139378944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139378944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187066880).

139378944 is an abundant number, since it is smaller than the sum of its proper divisors (234754816).

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

139378944 is a wasteful number, since it uses less digits than its factorization.

139378944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1561 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 139378944 is about 11805.8859896240. The cubic root of 139378944 is about 518.4804554292.

The spelling of 139378944 in words is "one hundred thirty-nine million, three hundred seventy-eight thousand, nine hundred forty-four".