4391924 has 12 divisors (see below), whose sum is σ = 7738500. Its totient is φ = 2180928.

The previous prime is 4391923. The next prime is 4391929. The reversal of 4391924 is 4291934.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 2044900 = 1532^2 + 1430^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391921) 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, 3089 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (644875).

Almost surely, 2^4391924 is an apocalyptic number.

It is an amenable number.

4391924 is a deficient number, since it is larger than the sum of its proper divisors (3346576).

4391924 is a wasteful number, since it uses less digits than its factorization.

4391924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522 (or 7520 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 4391924 is about 2095.6917712297. The cubic root of 4391924 is about 163.7639375896.

The spelling of 4391924 in words is "four million, three hundred ninety-one thousand, nine hundred twenty-four".