4991904 has 36 divisors (see below), whose sum is σ = 14196546. Its totient is φ = 1663872.

The previous prime is 4991893. The next prime is 4991923. The reversal of 4991904 is 4091994.

It can be written as a sum of positive squares in only one way, i.e., 4928400 + 63504 = 2220^2 + 252^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8379 + ... + 8954.

Almost surely, 2^4991904 is an apocalyptic number.

It is an amenable number.

4991904 is an abundant number, since it is smaller than the sum of its proper divisors (9204642).

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

4991904 is a wasteful number, since it uses less digits than its factorization.

4991904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349 (or 17338 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 4991904 is about 2234.2569234535. The cubic root of 4991904 is about 170.9052517074.

The spelling of 4991904 in words is "four million, nine hundred ninety-one thousand, nine hundred four".