3909724 has 48 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 1476288.

The previous prime is 3909709. The next prime is 3909733. The reversal of 3909724 is 4279093.

It is a self number, because there is not a number n which added to its sum of digits gives 3909724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8139 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

Almost surely, 2^3909724 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 3909724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4402944).

3909724 is an abundant number, since it is smaller than the sum of its proper divisors (4896164).

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

3909724 is a wasteful number, since it uses less digits than its factorization.

3909724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 3909724 is about 1977.3022024971. The cubic root of 3909724 is about 157.5368050377.

The spelling of 3909724 in words is "three million, nine hundred nine thousand, seven hundred twenty-four".