139289444 has 24 divisors (see below), whose sum is σ = 278853120. Its totient is φ = 59636736.

The previous prime is 139289419. The next prime is 139289461. The reversal of 139289444 is 444982931.

It is a junction number, because it is equal to n+sod(n) for n = 139289395 and 139289404.

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, 38564 + ... + 42020.

It is an arithmetic number, because the mean of its divisors is an integer number (11618880).

Almost surely, 2^139289444 is an apocalyptic number.

139289444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

139289444 is an abundant number, since it is smaller than the sum of its proper divisors (139563676).

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

139289444 is a wasteful number, since it uses less digits than its factorization.

139289444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907 (or 4905 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 139289444 is about 11802.0948987881. The cubic root of 139289444 is about 518.3694536391.

The spelling of 139289444 in words is "one hundred thirty-nine million, two hundred eighty-nine thousand, four hundred forty-four".