169890804 has 48 divisors (see below), whose sum is σ = 443665600. Its totient is φ = 56217888.

The previous prime is 169890793. The next prime is 169890863. The reversal of 169890804 is 408098961.

It is a self number, because there is not a number n which added to its sum of digits gives 169890804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9354 + ... + 20670.

Almost surely, 2^169890804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169890804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221832800).

169890804 is an abundant number, since it is smaller than the sum of its proper divisors (273774796).

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

169890804 is a wasteful number, since it uses less digits than its factorization.

169890804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11469 (or 11461 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 169890804 is about 13034.2166623085. The cubic root of 169890804 is about 553.8471907566.

The spelling of 169890804 in words is "one hundred sixty-nine million, eight hundred ninety thousand, eight hundred four".