3640149 has 6 divisors (see below), whose sum is σ = 5258006. Its totient is φ = 2426760.

The previous prime is 3640121. The next prime is 3640151. The reversal of 3640149 is 9410463.

3640149 is a `hidden beast` number, since 3 + 640 + 14 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2537649 + 1102500 = 1593^2 + 1050^2 .

It is not a de Polignac number, because 3640149 - 2⁹ = 3639637 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 (3640249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202222 + ... + 202239.

Almost surely, 2^3640149 is an apocalyptic number.

It is an amenable number.

3640149 is a deficient number, since it is larger than the sum of its proper divisors (1617857).

3640149 is a wasteful number, since it uses less digits than its factorization.

3640149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404467 (or 404464 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3640149 is about 1907.9174510445. The cubic root of 3640149 is about 153.8295325184.

The spelling of 3640149 in words is "three million, six hundred forty thousand, one hundred forty-nine".