1392816894 has 64 divisors (see below), whose sum is σ = 3306700800. Its totient is φ = 382847328.

The previous prime is 1392816883. The next prime is 1392816947. The reversal of 1392816894 is 4986182931.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110487 + ... + 122445.

It is an arithmetic number, because the mean of its divisors is an integer number (51667200).

Almost surely, 2^1392816894 is an apocalyptic number.

1392816894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392816894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653350400).

1392816894 is an abundant number, since it is smaller than the sum of its proper divisors (1913883906).

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

1392816894 is a wasteful number, since it uses less digits than its factorization.

1392816894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12077.

The product of its digits is 746496, while the sum is 51.

The square root of 1392816894 is about 37320.4621354023. The cubic root of 1392816894 is about 1116.7724078773.

The spelling of 1392816894 in words is "one billion, three hundred ninety-two million, eight hundred sixteen thousand, eight hundred ninety-four".