3646431 has 16 divisors (see below), whose sum is σ = 5589600. Its totient is φ = 2346624.

The previous prime is 3646427. The next prime is 3646441. The reversal of 3646431 is 1346463.

It is not a de Polignac number, because 3646431 - 2² = 3646427 is a prime.

It is a super-2 number, since 2×3646431² = 26592918075522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 3646395 and 3646404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (349350).

Almost surely, 2^3646431 is an apocalyptic number.

3646431 is a deficient number, since it is larger than the sum of its proper divisors (1943169).

3646431 is a wasteful number, since it uses less digits than its factorization.

3646431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695 (or 4689 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 3646431 is about 1909.5630390223. The cubic root of 3646431 is about 153.9179722826.

Subtracting from 3646431 its reverse (1346463), we obtain a cube (2299968 = 132³).

The spelling of 3646431 in words is "three million, six hundred forty-six thousand, four hundred thirty-one".