8216947404 has 36 divisors (see below), whose sum is σ = 21863809240. Its totient is φ = 2594825280.

The previous prime is 8216947393. The next prime is 8216947463. The reversal of 8216947404 is 4047496128.

8216947404 is a `hidden beast` number, since 82 + 169 + 4 + 7 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8216947404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6005857 + ... + 6007224.

Almost surely, 2^8216947404 is an apocalyptic number.

It is an amenable number.

8216947404 is an abundant number, since it is smaller than the sum of its proper divisors (13646861836).

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

8216947404 is a wasteful number, since it uses less digits than its factorization.

8216947404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12013110 (or 12013105 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 8216947404 is about 90647.3794657077. The cubic root of 8216947404 is about 2017.9179445806.

The spelling of 8216947404 in words is "eight billion, two hundred sixteen million, nine hundred forty-seven thousand, four hundred four".