1298423792 has 20 divisors (see below), whose sum is σ = 2534903976. Its totient is φ = 644255040.

The previous prime is 1298423779. The next prime is 1298423803. The reversal of 1298423792 is 2973248921.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 307643 + ... + 311834.

Almost surely, 2^1298423792 is an apocalyptic number.

It is an amenable number.

1298423792 is a deficient number, since it is larger than the sum of its proper divisors (1236480184).

1298423792 is a wasteful number, since it uses less digits than its factorization.

1298423792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619616 (or 619610 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 1298423792 is about 36033.6480528963. The cubic root of 1298423792 is about 1090.9516118005.

The spelling of 1298423792 in words is "one billion, two hundred ninety-eight million, four hundred twenty-three thousand, seven hundred ninety-two".