1389490368 has 112 divisors (see below), whose sum is σ = 4422769920. Its totient is φ = 376095744.

The previous prime is 1389490357. The next prime is 1389490379. The reversal of 1389490368 is 8630949831.

It is an interprime number because it is at equal distance from previous prime (1389490357) and next prime (1389490379).

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 1389490368.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1671 + ... + 52742.

Almost surely, 2^1389490368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389490368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211384960).

1389490368 is an abundant number, since it is smaller than the sum of its proper divisors (3033279552).

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

1389490368 is a wasteful number, since it uses less digits than its factorization.

1389490368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54454 (or 54444 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 1389490368 is about 37275.8684405877. The cubic root of 1389490368 is about 1115.8826202004.

The spelling of 1389490368 in words is "one billion, three hundred eighty-nine million, four hundred ninety thousand, three hundred sixty-eight".