816009418 has 24 divisors (see below), whose sum is σ = 1486007712. Its totient is φ = 329145024.

The previous prime is 816009343. The next prime is 816009421. The reversal of 816009418 is 814900618.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96796 + ... + 104887.

It is an arithmetic number, because the mean of its divisors is an integer number (61916988).

Almost surely, 2^816009418 is an apocalyptic number.

816009418 is a deficient number, since it is larger than the sum of its proper divisors (669998294).

816009418 is a wasteful number, since it uses less digits than its factorization.

816009418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201726 (or 201709 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 816009418 is about 28565.8785616686. The cubic root of 816009418 is about 934.4693407546.

The spelling of 816009418 in words is "eight hundred sixteen million, nine thousand, four hundred eighteen".