4991872 has 32 divisors (see below), whose sum is σ = 10128600. Its totient is φ = 2449920.

The previous prime is 4991867. The next prime is 4991879. The reversal of 4991872 is 2781994.

It is a tau number, because it is divible by the number of its divisors (32).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991879) 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, 7222 + ... + 7882.

Almost surely, 2^4991872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4991872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5064300).

4991872 is an abundant number, since it is smaller than the sum of its proper divisors (5136728).

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

4991872 is an equidigital number, since it uses as much as digits as its factorization.

4991872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 722 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 4991872 is about 2234.2497622244. The cubic root of 4991872 is about 170.9048865174.

The spelling of 4991872 in words is "four million, nine hundred ninety-one thousand, eight hundred seventy-two".