1638224808 has 48 divisors (see below), whose sum is σ = 4501741440. Its totient is φ = 496430880.

The previous prime is 1638224789. The next prime is 1638224837. The reversal of 1638224808 is 8084228361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1638224808.

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, 279160 + ... + 284967.

It is an arithmetic number, because the mean of its divisors is an integer number (93786280).

Almost surely, 2^1638224808 is an apocalyptic number.

It is an amenable number.

1638224808 is an abundant number, since it is smaller than the sum of its proper divisors (2863516632).

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

1638224808 is a wasteful number, since it uses less digits than its factorization.

1638224808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564158 (or 564143 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 1638224808 is about 40474.9899073490. The cubic root of 1638224808 is about 1178.8480590016.

The spelling of 1638224808 in words is "one billion, six hundred thirty-eight million, two hundred twenty-four thousand, eight hundred eight".