4991826 has 24 divisors (see below), whose sum is σ = 11614320. Its totient is φ = 1426152.

The previous prime is 4991803. The next prime is 4991839. The reversal of 4991826 is 6281994.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8196 + ... + 8783.

It is an arithmetic number, because the mean of its divisors is an integer number (483930).

Almost surely, 2^4991826 is an apocalyptic number.

4991826 is an abundant number, since it is smaller than the sum of its proper divisors (6622494).

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

4991826 is a wasteful number, since it uses less digits than its factorization.

4991826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16998 (or 16991 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 4991826 is about 2234.2394679174. The cubic root of 4991826 is about 170.9043615541.

The spelling of 4991826 in words is "four million, nine hundred ninety-one thousand, eight hundred twenty-six".