169890812 has 24 divisors (see below), whose sum is σ = 365919456. Its totient is φ = 67209408.

The previous prime is 169890793. The next prime is 169890863. The reversal of 169890812 is 218098961.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233003 + ... + 233730.

It is an arithmetic number, because the mean of its divisors is an integer number (15246644).

Almost surely, 2^169890812 is an apocalyptic number.

It is an amenable number.

169890812 is an abundant number, since it is smaller than the sum of its proper divisors (196028644).

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

169890812 is a wasteful number, since it uses less digits than its factorization.

169890812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466757 (or 466755 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 169890812 is about 13034.2169691930. The cubic root of 169890812 is about 553.8471994500.

The spelling of 169890812 in words is "one hundred sixty-nine million, eight hundred ninety thousand, eight hundred twelve".