1298478818 has 32 divisors (see below), whose sum is σ = 2436510720. Its totient is φ = 505258560.

The previous prime is 1298478793. The next prime is 1298478833. The reversal of 1298478818 is 8188748921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47378 + ... + 69581.

It is an arithmetic number, because the mean of its divisors is an integer number (76140960).

Almost surely, 2^1298478818 is an apocalyptic number.

1298478818 is a deficient number, since it is larger than the sum of its proper divisors (1138031902).

1298478818 is a wasteful number, since it uses less digits than its factorization.

1298478818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117042.

The product of its digits is 2064384, while the sum is 56.

The square root of 1298478818 is about 36034.4115811539. The cubic root of 1298478818 is about 1090.9670227564.

The spelling of 1298478818 in words is "one billion, two hundred ninety-eight million, four hundred seventy-eight thousand, eight hundred eighteen".