1389209412 has 24 divisors (see below), whose sum is σ = 3266236512. Its totient is φ = 459534400.

The previous prime is 1389209399. The next prime is 1389209431. The reversal of 1389209412 is 2149029831.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 440289 + ... + 443432.

It is an arithmetic number, because the mean of its divisors is an integer number (136093188).

Almost surely, 2^1389209412 is an apocalyptic number.

1389209412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389209412 is an abundant number, since it is smaller than the sum of its proper divisors (1877027100).

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

1389209412 is a wasteful number, since it uses less digits than its factorization.

1389209412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883859 (or 883857 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1389209412 is about 37272.0996457135. The cubic root of 1389209412 is about 1115.8074043615.

The spelling of 1389209412 in words is "one billion, three hundred eighty-nine million, two hundred nine thousand, four hundred twelve".