3640436 has 6 divisors (see below), whose sum is σ = 6370770. Its totient is φ = 1820216.

The previous prime is 3640409. The next prime is 3640447. The reversal of 3640436 is 6340463.

It can be written as a sum of positive squares in only one way, i.e., 3400336 + 240100 = 1844^2 + 490^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455051 + ... + 455058.

It is an arithmetic number, because the mean of its divisors is an integer number (1061795).

Almost surely, 2^3640436 is an apocalyptic number.

It is an amenable number.

3640436 is a deficient number, since it is larger than the sum of its proper divisors (2730334).

3640436 is a wasteful number, since it uses less digits than its factorization.

3640436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910113 (or 910111 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 3640436 is about 1907.9926624597. The cubic root of 3640436 is about 153.8335752024.

Adding to 3640436 its reverse (6340463), we get a palindrome (9980899).

The spelling of 3640436 in words is "three million, six hundred forty thousand, four hundred thirty-six".