1278474618 has 8 divisors (see below), whose sum is σ = 2556949248. Its totient is φ = 426158204.

The previous prime is 1278474607. The next prime is 1278474629. The reversal of 1278474618 is 8164748721.

It is an interprime number because it is at equal distance from previous prime (1278474607) and next prime (1278474629).

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

1278474618 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106539546 + ... + 106539557.

It is an arithmetic number, because the mean of its divisors is an integer number (319618656).

Almost surely, 2^1278474618 is an apocalyptic number.

1278474618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1278474618 is a wasteful number, since it uses less digits than its factorization.

1278474618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213079108.

The product of its digits is 602112, while the sum is 48.

The square root of 1278474618 is about 35755.7634235377. The cubic root of 1278474618 is about 1085.3355706356.

The spelling of 1278474618 in words is "one billion, two hundred seventy-eight million, four hundred seventy-four thousand, six hundred eighteen".