1392447894 has 16 divisors (see below), whose sum is σ = 2874731520. Its totient is φ = 449176680.

The previous prime is 1392447893. The next prime is 1392447907. The reversal of 1392447894 is 4987442931.

It is a super-2 number, since 2×1392447894² = 3877822275010070472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392447893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3742954 + ... + 3743325.

It is an arithmetic number, because the mean of its divisors is an integer number (179670720).

Almost surely, 2^1392447894 is an apocalyptic number.

1392447894 is an abundant number, since it is smaller than the sum of its proper divisors (1482283626).

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

1392447894 is a wasteful number, since it uses less digits than its factorization.

1392447894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486315.

The product of its digits is 1741824, while the sum is 51.

The square root of 1392447894 is about 37315.5181392407. The cubic root of 1392447894 is about 1116.6737767226.

The spelling of 1392447894 in words is "one billion, three hundred ninety-two million, four hundred forty-seven thousand, eight hundred ninety-four".