3649388005 has 8 divisors (see below), whose sum is σ = 4393082232. Its totient is φ = 2910299328.

The previous prime is 3649388003. The next prime is 3649388021. The reversal of 3649388005 is 5008839463.

It can be written as a sum of positive squares in 4 ways, for example, as 272151009 + 3377236996 = 16497^2 + 58114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3649388005 - 2¹ = 3649388003 is a prime.

It is a super-2 number, since 2×3649388005² = 26636065622075760050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649388003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149642 + ... + 1152811.

It is an arithmetic number, because the mean of its divisors is an integer number (549135279).

Almost surely, 2^3649388005 is an apocalyptic number.

It is an amenable number.

3649388005 is a deficient number, since it is larger than the sum of its proper divisors (743694227).

3649388005 is a wasteful number, since it uses less digits than its factorization.

3649388005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302775.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3649388005 is about 60410.1647489891. The cubic root of 3649388005 is about 1539.5956667459.

The spelling of 3649388005 in words is "three billion, six hundred forty-nine million, three hundred eighty-eight thousand, five".