3640499 has 4 divisors (see below), whose sum is σ = 3854664. Its totient is φ = 3426336.

The previous prime is 3640493. The next prime is 3640519. The reversal of 3640499 is 9940463.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3640499 - 2⁸ = 3640243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640493) 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 3 ways as a sum of consecutive naturals, for example, 107057 + ... + 107090.

It is an arithmetic number, because the mean of its divisors is an integer number (963666).

Almost surely, 2^3640499 is an apocalyptic number.

3640499 is a deficient number, since it is larger than the sum of its proper divisors (214165).

3640499 is a wasteful number, since it uses less digits than its factorization.

3640499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214164.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3640499 is about 1908.0091718857. The cubic root of 3640499 is about 153.8344625923.

Subtracting from 3640499 its sum of digits (35), we obtain a square (3640464 = 1908²).

The spelling of 3640499 in words is "three million, six hundred forty thousand, four hundred ninety-nine".