3643018 has 4 divisors (see below), whose sum is σ = 5464530. Its totient is φ = 1821508.

The previous prime is 3643001. The next prime is 3643033. The reversal of 3643018 is 8103463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8103463 = 1109 ⋅7307.

It can be written as a sum of positive squares in only one way, i.e., 3621409 + 21609 = 1903^2 + 147^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3642983 and 3643001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910753 + ... + 910756.

Almost surely, 2^3643018 is an apocalyptic number.

3643018 is a deficient number, since it is larger than the sum of its proper divisors (1821512).

3643018 is a wasteful number, since it uses less digits than its factorization.

3643018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821511.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 3643018 is about 1908.6691698668. The cubic root of 3643018 is about 153.8699357210.

The spelling of 3643018 in words is "three million, six hundred forty-three thousand, eighteen".