4991856 has 20 divisors (see below), whose sum is σ = 12895752. Its totient is φ = 1663936.

The previous prime is 4991849. The next prime is 4991867. The reversal of 4991856 is 6581994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51951 + ... + 52046.

Almost surely, 2^4991856 is an apocalyptic number.

It is an amenable number.

4991856 is an abundant number, since it is smaller than the sum of its proper divisors (7903896).

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

4991856 is a wasteful number, since it uses less digits than its factorization.

4991856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104008 (or 104002 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 4991856 is about 2234.2461816013. The cubic root of 4991856 is about 170.9047039219.

The spelling of 4991856 in words is "four million, nine hundred ninety-one thousand, eight hundred fifty-six".