139477844 has 12 divisors (see below), whose sum is σ = 266275968. Its totient is φ = 63399000.

The previous prime is 139477837. The next prime is 139477861. The reversal of 139477844 is 448774931.

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 3 ways as a sum of consecutive naturals, for example, 1584932 + ... + 1585019.

It is an arithmetic number, because the mean of its divisors is an integer number (22189664).

Almost surely, 2^139477844 is an apocalyptic number.

It is an amenable number.

139477844 is a deficient number, since it is larger than the sum of its proper divisors (126798124).

139477844 is a wasteful number, since it uses less digits than its factorization.

139477844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169966 (or 3169964 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 139477844 is about 11810.0738355016. The cubic root of 139477844 is about 518.6030602547.

The spelling of 139477844 in words is "one hundred thirty-nine million, four hundred seventy-seven thousand, eight hundred forty-four".