3644391 has 16 divisors (see below), whose sum is σ = 5068800. Its totient is φ = 2326560.

The previous prime is 3644357. The next prime is 3644411. The reversal of 3644391 is 1934463.

It is not a de Polignac number, because 3644391 - 2¹¹ = 3642343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644321) 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, 13726 + ... + 13988.

It is an arithmetic number, because the mean of its divisors is an integer number (316800).

Almost surely, 2^3644391 is an apocalyptic number.

3644391 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3644391 is a deficient number, since it is larger than the sum of its proper divisors (1424409).

3644391 is a wasteful number, since it uses less digits than its factorization.

3644391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its digits is 7776, while the sum is 30.

The square root of 3644391 is about 1909.0288106784. The cubic root of 3644391 is about 153.8892637330.

The spelling of 3644391 in words is "three million, six hundred forty-four thousand, three hundred ninety-one".