1239669444 has 48 divisors (see below), whose sum is σ = 3298313088. Its totient is φ = 358998528.

The previous prime is 1239669439. The next prime is 1239669449. The reversal of 1239669444 is 4449669321.

1239669444 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1239669439) and next prime (1239669449).

It is a junction number, because it is equal to n+sod(n) for n = 1239669393 and 1239669402.

It is not an unprimeable number, because it can be changed into a prime (1239669449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231072 + ... + 236375.

It is an arithmetic number, because the mean of its divisors is an integer number (68714856).

Almost surely, 2^1239669444 is an apocalyptic number.

It is an amenable number.

1239669444 is an abundant number, since it is smaller than the sum of its proper divisors (2058643644).

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

1239669444 is a wasteful number, since it uses less digits than its factorization.

1239669444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467484 (or 467482 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 1239669444 is about 35208.9398306737. The cubic root of 1239669444 is about 1074.2415978368.

The spelling of 1239669444 in words is "one billion, two hundred thirty-nine million, six hundred sixty-nine thousand, four hundred forty-four".