139073844 has 96 divisors (see below), whose sum is σ = 420474880. Its totient is φ = 34743168.

The previous prime is 139073813. The next prime is 139073849. The reversal of 139073844 is 448370931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139073849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17397 + ... + 24099.

Almost surely, 2^139073844 is an apocalyptic number.

139073844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139073844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210237440).

139073844 is an abundant number, since it is smaller than the sum of its proper divisors (281401036).

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

139073844 is a wasteful number, since it uses less digits than its factorization.

139073844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6747 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 139073844 is about 11792.9573899001. The cubic root of 139073844 is about 518.1018617727.

The spelling of 139073844 in words is "one hundred thirty-nine million, seventy-three thousand, eight hundred forty-four".