4991604 has 24 divisors (see below), whose sum is σ = 12260640. Its totient is φ = 1576224.

The previous prime is 4991587. The next prime is 4991617. The reversal of 4991604 is 4061994.

It is a super-2 number, since 2×4991604² = 49832220985632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10719 + ... + 11174.

It is an arithmetic number, because the mean of its divisors is an integer number (510860).

Almost surely, 2^4991604 is an apocalyptic number.

It is an amenable number.

4991604 is an abundant number, since it is smaller than the sum of its proper divisors (7269036).

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

4991604 is a wasteful number, since it uses less digits than its factorization.

4991604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21919 (or 21917 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 4991604 is about 2234.1897860298. The cubic root of 4991604 is about 170.9018279902.

The spelling of 4991604 in words is "four million, nine hundred ninety-one thousand, six hundred four".