3643431 has 12 divisors (see below), whose sum is σ = 5340216. Its totient is φ = 2207920.

The previous prime is 3643429. The next prime is 3643447. The reversal of 3643431 is 1343463.

It is not a de Polignac number, because 3643431 - 2¹ = 3643429 is a prime.

It is a super-2 number, since 2×3643431² = 26549178903522, which contains 22 as substring.

3643431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4656 + ... + 5381.

It is an arithmetic number, because the mean of its divisors is an integer number (445018).

Almost surely, 2^3643431 is an apocalyptic number.

3643431 is a deficient number, since it is larger than the sum of its proper divisors (1696785).

3643431 is a wasteful number, since it uses less digits than its factorization.

3643431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062 (or 10051 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 3643431 is about 1908.7773573678. Note that the first 3 decimals coincide. The cubic root of 3643431 is about 153.8757501201.

Adding to 3643431 its reverse (1343463), we get a palindrome (4986894).

Subtracting from 3643431 its reverse (1343463), we obtain a cube (2299968 = 132³).

The spelling of 3643431 in words is "three million, six hundred forty-three thousand, four hundred thirty-one".