1392390889 has 8 divisors (see below), whose sum is σ = 1470109280. Its totient is φ = 1315116000.

The previous prime is 1392390877. The next prime is 1392390911. The reversal of 1392390889 is 9880932931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1392390889 - 2¹³ = 1392382697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392390589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104412 + ... + 116989.

It is an arithmetic number, because the mean of its divisors is an integer number (183763660).

Almost surely, 2^1392390889 is an apocalyptic number.

1392390889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1392390889 is a deficient number, since it is larger than the sum of its proper divisors (77718391).

1392390889 is a wasteful number, since it uses less digits than its factorization.

1392390889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221751.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1392390889 is about 37314.7543071102. The cubic root of 1392390889 is about 1116.6585381255.

The spelling of 1392390889 in words is "one billion, three hundred ninety-two million, three hundred ninety thousand, eight hundred eighty-nine".