819474984 has 24 divisors (see below), whose sum is σ = 2219411610. Its totient is φ = 273158304.

The previous prime is 819474967. The next prime is 819474989. The reversal of 819474984 is 489474918.

819474984 is a `hidden beast` number, since 81 + 9 + 474 + 98 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 442260900 + 377214084 = 21030^2 + 19422^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 819474984.

It is not an unprimeable number, because it can be changed into a prime (819474989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5690727 + ... + 5690870.

Almost surely, 2^819474984 is an apocalyptic number.

It is an amenable number.

819474984 is an abundant number, since it is smaller than the sum of its proper divisors (1399936626).

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

819474984 is a wasteful number, since it uses less digits than its factorization.

819474984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11381609 (or 11381602 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 819474984 is about 28626.4734817267. The cubic root of 819474984 is about 935.7903595801.

The spelling of 819474984 in words is "eight hundred nineteen million, four hundred seventy-four thousand, nine hundred eighty-four".