3649239 has 24 divisors (see below), whose sum is σ = 5947760. Its totient is φ = 2209680.

The previous prime is 3649229. The next prime is 3649241. The reversal of 3649239 is 9329463.

It is a happy number.

3649239 is a `hidden beast` number, since 3 + 649 + 2 + 3 + 9 = 666.

It is not a de Polignac number, because 3649239 - 2⁵ = 3649207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2709 + ... + 3825.

Almost surely, 2^3649239 is an apocalyptic number.

3649239 is a deficient number, since it is larger than the sum of its proper divisors (2298521).

3649239 is a wasteful number, since it uses less digits than its factorization.

3649239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1131 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 3649239 is about 1910.2981442696. The cubic root of 3649239 is about 153.9574712495.

The spelling of 3649239 in words is "three million, six hundred forty-nine thousand, two hundred thirty-nine".