4393631 has 8 divisors (see below), whose sum is σ = 4834128. Its totient is φ = 3993000.

The previous prime is 4393591. The next prime is 4393637. The reversal of 4393631 is 1363934.

It is not a de Polignac number, because 4393631 - 2¹⁸ = 4131487 is a prime.

It is a super-2 number, since 2×4393631² = 38607986728322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4393594 and 4393603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4393637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 320 + ... + 2981.

It is an arithmetic number, because the mean of its divisors is an integer number (604266).

Almost surely, 2^4393631 is an apocalyptic number.

4393631 is a deficient number, since it is larger than the sum of its proper divisors (440497).

4393631 is an equidigital number, since it uses as much as digits as its factorization.

4393631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334 (or 3312 counting only the distinct ones).

The product of its digits is 5832, while the sum is 29.

The square root of 4393631 is about 2096.0989957538. The cubic root of 4393631 is about 163.7851514382.

The spelling of 4393631 in words is "four million, three hundred ninety-three thousand, six hundred thirty-one".