1396449998 has 4 divisors (see below), whose sum is σ = 2094675000. Its totient is φ = 698224998.

The previous prime is 1396449919. The next prime is 1396450031. The reversal of 1396449998 is 8999446931.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1396449998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349112498 + ... + 349112501.

It is an arithmetic number, because the mean of its divisors is an integer number (523668750).

Almost surely, 2^1396449998 is an apocalyptic number.

1396449998 is a deficient number, since it is larger than the sum of its proper divisors (698225002).

1396449998 is an equidigital number, since it uses as much as digits as its factorization.

1396449998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698225001.

The product of its digits is 15116544, while the sum is 62.

The square root of 1396449998 is about 37369.1048594959. The cubic root of 1396449998 is about 1117.7425826873.

The spelling of 1396449998 in words is "one billion, three hundred ninety-six million, four hundred forty-nine thousand, nine hundred ninety-eight".