1392228647 has 4 divisors (see below), whose sum is σ = 1392728496. Its totient is φ = 1391728800.

The previous prime is 1392228623. The next prime is 1392228653. The reversal of 1392228647 is 7468222931.

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

It is a cyclic number.

It is not a de Polignac number, because 1392228647 - 2⁸ = 1392228391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1392228598 and 1392228607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392228697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245723 + ... + 251324.

It is an arithmetic number, because the mean of its divisors is an integer number (348182124).

Almost surely, 2^1392228647 is an apocalyptic number.

1392228647 is a deficient number, since it is larger than the sum of its proper divisors (499849).

1392228647 is an equidigital number, since it uses as much as digits as its factorization.

1392228647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499848.

The product of its digits is 290304, while the sum is 44.

The square root of 1392228647 is about 37312.5802779706. The cubic root of 1392228647 is about 1116.6151652592.

The spelling of 1392228647 in words is "one billion, three hundred ninety-two million, two hundred twenty-eight thousand, six hundred forty-seven".