3518649 has 6 divisors (see below), whose sum is σ = 5082506. Its totient is φ = 2345760.

The previous prime is 3518633. The next prime is 3518651. The reversal of 3518649 is 9468153.

3518649 is a `hidden beast` number, since 3 + 5 + 1 + 8 + 649 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 59049 = 1860^2 + 243^2 .

It is not a de Polignac number, because 3518649 - 2⁴ = 3518633 is a prime.

It is a Duffinian number.

3518649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3518659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195472 + ... + 195489.

Almost surely, 2^3518649 is an apocalyptic number.

It is an amenable number.

3518649 is a deficient number, since it is larger than the sum of its proper divisors (1563857).

3518649 is a wasteful number, since it uses less digits than its factorization.

3518649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390967 (or 390964 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3518649 is about 1875.8062266663. The cubic root of 3518649 is about 152.0986346190.

The spelling of 3518649 in words is "three million, five hundred eighteen thousand, six hundred forty-nine".