4991724 has 36 divisors (see below), whose sum is σ = 12686856. Its totient is φ = 1654848.

The previous prime is 4991719. The next prime is 4991771. The reversal of 4991724 is 4271994.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11047 + ... + 11489.

Almost surely, 2^4991724 is an apocalyptic number.

It is an amenable number.

4991724 is an abundant number, since it is smaller than the sum of its proper divisors (7695132).

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

4991724 is a wasteful number, since it uses less digits than its factorization.

4991724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 761 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 4991724 is about 2234.2166412414. The cubic root of 4991724 is about 170.9031974935.

The spelling of 4991724 in words is "four million, nine hundred ninety-one thousand, seven hundred twenty-four".