1399370618 has 8 divisors (see below), whose sum is σ = 2099309940. Its totient is φ = 699600640.

The previous prime is 1399370603. The next prime is 1399370641. The reversal of 1399370618 is 8160739931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1391513809 + 7856809 = 37303^2 + 2803^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 19133 + ... + 56256.

Almost surely, 2^1399370618 is an apocalyptic number.

1399370618 is a deficient number, since it is larger than the sum of its proper divisors (699939322).

1399370618 is an equidigital number, since it uses as much as digits as its factorization.

1399370618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84672.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1399370618 is about 37408.1624515292. The cubic root of 1399370618 is about 1118.5212782198.

The spelling of 1399370618 in words is "one billion, three hundred ninety-nine million, three hundred seventy thousand, six hundred eighteen".