1392447746 has 4 divisors (see below), whose sum is σ = 2088671622. Its totient is φ = 696223872.

The previous prime is 1392447703. The next prime is 1392447767. The reversal of 1392447746 is 6477442931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 964413025 + 428034721 = 31055^2 + 20689^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1392447746.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348111935 + ... + 348111938.

Almost surely, 2^1392447746 is an apocalyptic number.

1392447746 is a deficient number, since it is larger than the sum of its proper divisors (696223876).

1392447746 is an equidigital number, since it uses as much as digits as its factorization.

1392447746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696223875.

The product of its digits is 1016064, while the sum is 47.

The square root of 1392447746 is about 37315.5161561515. The cubic root of 1392447746 is about 1116.6737371598.

The spelling of 1392447746 in words is "one billion, three hundred ninety-two million, four hundred forty-seven thousand, seven hundred forty-six".