4991808 has 28 divisors (see below), whose sum is σ = 13208000. Its totient is φ = 1663872.

The previous prime is 4991803. The next prime is 4991839. The reversal of 4991808 is 8081994.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12808 + ... + 13191.

Almost surely, 2^4991808 is an apocalyptic number.

4991808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4991808 is an abundant number, since it is smaller than the sum of its proper divisors (8216192).

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

4991808 is a wasteful number, since it uses less digits than its factorization.

4991808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26014 (or 26004 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 4991808 is about 2234.2354396974. The cubic root of 4991808 is about 170.9041561328.

The spelling of 4991808 in words is "four million, nine hundred ninety-one thousand, eight hundred eight".