1389370808 has 16 divisors (see below), whose sum is σ = 2977223280. Its totient is φ = 595444608.

The previous prime is 1389370799. The next prime is 1389370817. The reversal of 1389370808 is 8080739831.

It is an interprime number because it is at equal distance from previous prime (1389370799) and next prime (1389370817).

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, 12405041 + ... + 12405152.

It is an arithmetic number, because the mean of its divisors is an integer number (186076455).

Almost surely, 2^1389370808 is an apocalyptic number.

It is an amenable number.

1389370808 is an abundant number, since it is smaller than the sum of its proper divisors (1587852472).

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

1389370808 is a wasteful number, since it uses less digits than its factorization.

1389370808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24810206 (or 24810202 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1389370808 is about 37274.2646875830. The cubic root of 1389370808 is about 1115.8506135606.

The spelling of 1389370808 in words is "one billion, three hundred eighty-nine million, three hundred seventy thousand, eight hundred eight".