1646993484 has 36 divisors (see below), whose sum is σ = 4203662736. Its totient is φ = 543666528.

The previous prime is 1646993459. The next prime is 1646993503. The reversal of 1646993484 is 4843996461.

It is a happy number.

1646993484 is a `hidden beast` number, since 16 + 4 + 69 + 93 + 484 = 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 1646993484.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 218379 + ... + 225794.

Almost surely, 2^1646993484 is an apocalyptic number.

It is an amenable number.

1646993484 is an abundant number, since it is smaller than the sum of its proper divisors (2556669252).

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

1646993484 is a wasteful number, since it uses less digits than its factorization.

1646993484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444286 (or 444281 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 1646993484 is about 40583.1674958966. The cubic root of 1646993484 is about 1180.9475975385.

The spelling of 1646993484 in words is "one billion, six hundred forty-six million, nine hundred ninety-three thousand, four hundred eighty-four".