1389449076 has 12 divisors (see below), whose sum is σ = 3242047872. Its totient is φ = 463149688.

The previous prime is 1389449059. The next prime is 1389449099. The reversal of 1389449076 is 6709449831.

It is a tau number, because it is divible by the number of its divisors (12).

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, 57893700 + ... + 57893723.

It is an arithmetic number, because the mean of its divisors is an integer number (270170656).

Almost surely, 2^1389449076 is an apocalyptic number.

It is an amenable number.

1389449076 is an abundant number, since it is smaller than the sum of its proper divisors (1852598796).

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

1389449076 is a wasteful number, since it uses less digits than its factorization.

1389449076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115787430 (or 115787428 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 1389449076 is about 37275.3145660771. The cubic root of 1389449076 is about 1115.8715663918.

The spelling of 1389449076 in words is "one billion, three hundred eighty-nine million, four hundred forty-nine thousand, seventy-six".