139001844 has 24 divisors (see below), whose sum is σ = 326708928. Its totient is φ = 45995200.

The previous prime is 139001831. The next prime is 139001851. The reversal of 139001844 is 448100931.

It is a happy number.

It is a congruent number.

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, 40632 + ... + 43919.

It is an arithmetic number, because the mean of its divisors is an integer number (13612872).

Almost surely, 2^139001844 is an apocalyptic number.

It is an amenable number.

139001844 is an abundant number, since it is smaller than the sum of its proper divisors (187707084).

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

139001844 is a wasteful number, since it uses less digits than its factorization.

139001844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84695 (or 84693 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 139001844 is about 11789.9043253116. The cubic root of 139001844 is about 518.0124374011.

The spelling of 139001844 in words is "one hundred thirty-nine million, one thousand, eight hundred forty-four".