3640506236 has 12 divisors (see below), whose sum is σ = 6375576480. Its totient is φ = 1818912960.

The previous prime is 3640506209. The next prime is 3640506251. The reversal of 3640506236 is 6326050463.

It is a junction number, because it is equal to n+sod(n) for n = 3640506196 and 3640506205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328916 + ... + 339803.

It is an arithmetic number, because the mean of its divisors is an integer number (531298040).

Almost surely, 2^3640506236 is an apocalyptic number.

It is an amenable number.

3640506236 is a deficient number, since it is larger than the sum of its proper divisors (2735070244).

3640506236 is a wasteful number, since it uses less digits than its factorization.

3640506236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670084 (or 670082 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 3640506236 is about 60336.6077601318. The cubic root of 3640506236 is about 1538.3456451476.

Adding to 3640506236 its reverse (6326050463), we get a palindrome (9966556699).

The spelling of 3640506236 in words is "three billion, six hundred forty million, five hundred six thousand, two hundred thirty-six".