4091724 has 72 divisors (see below), whose sum is σ = 12740000. Its totient is φ = 1078272.

The previous prime is 4091693. The next prime is 4091729. The reversal of 4091724 is 4271904.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4091729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2652 + ... + 3900.

Almost surely, 2^4091724 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 4091724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6370000).

4091724 is an abundant number, since it is smaller than the sum of its proper divisors (8648276).

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

4091724 is a wasteful number, since it uses less digits than its factorization.

4091724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 4091724 is about 2022.8010282774. The cubic root of 4091724 is about 159.9443035308.

The spelling of 4091724 in words is "four million, ninety-one thousand, seven hundred twenty-four".