2169904 has 20 divisors (see below), whose sum is σ = 4586760. Its totient is φ = 986240.

The previous prime is 2169883. The next prime is 2169913. The reversal of 2169904 is 4099612.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5989 + ... + 6340.

It is an arithmetic number, because the mean of its divisors is an integer number (229338).

2^2169904 is an apocalyptic number.

It is an amenable number.

2169904 is an abundant number, since it is smaller than the sum of its proper divisors (2416856).

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

2169904 is a wasteful number, since it uses less digits than its factorization.

2169904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12348 (or 12342 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2169904 is about 1473.0594013820. The cubic root of 2169904 is about 129.4633498448.

The spelling of 2169904 in words is "two million, one hundred sixty-nine thousand, nine hundred four".