2991804 has 12 divisors (see below), whose sum is σ = 6980904. Its totient is φ = 997264.

The previous prime is 2991803. The next prime is 2991853. The reversal of 2991804 is 4081992.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991803) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 124647 + ... + 124670.

It is an arithmetic number, because the mean of its divisors is an integer number (581742).

2^2991804 is an apocalyptic number.

It is an amenable number.

2991804 is an abundant number, since it is smaller than the sum of its proper divisors (3989100).

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

2991804 is a wasteful number, since it uses less digits than its factorization.

2991804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249324 (or 249322 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 2991804 is about 1729.6832079893. The cubic root of 2991804 is about 144.0934963803.

The spelling of 2991804 in words is "two million, nine hundred ninety-one thousand, eight hundred four".