1478638866 has 8 divisors (see below), whose sum is σ = 2957277744. Its totient is φ = 492879620.

The previous prime is 1478638859. The next prime is 1478638873. The reversal of 1478638866 is 6688368741.

It is an interprime number because it is at equal distance from previous prime (1478638859) and next prime (1478638873).

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

1478638866 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, 123219900 + ... + 123219911.

It is an arithmetic number, because the mean of its divisors is an integer number (369659718).

Almost surely, 2^1478638866 is an apocalyptic number.

1478638866 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.

1478638866 is a wasteful number, since it uses less digits than its factorization.

1478638866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246439816.

The product of its digits is 9289728, while the sum is 57.

The square root of 1478638866 is about 38453.0735572594. The cubic root of 1478638866 is about 1139.2543770014.

The spelling of 1478638866 in words is "one billion, four hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred sixty-six".