1398833618 has 144 divisors (see below), whose sum is σ = 2907328320. Its totient is φ = 492500736.

The previous prime is 1398833567. The next prime is 1398833629. The reversal of 1398833618 is 8163388931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 37806296 + ... + 37806332.

It is an arithmetic number, because the mean of its divisors is an integer number (20189780).

Almost surely, 2^1398833618 is an apocalyptic number.

1398833618 is an abundant number, since it is smaller than the sum of its proper divisors (1508494702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398833618 is a wasteful number, since it uses less digits than its factorization.

1398833618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 107 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 1398833618 is about 37400.9841849115. The cubic root of 1398833618 is about 1118.3781846589.

The spelling of 1398833618 in words is "one billion, three hundred ninety-eight million, eight hundred thirty-three thousand, six hundred eighteen".