3645290 has 32 divisors (see below), whose sum is σ = 7395840. Its totient is φ = 1281600.

The previous prime is 3645289. The next prime is 3645307. The reversal of 3645290 is 925463.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2876 + ... + 3944.

It is an arithmetic number, because the mean of its divisors is an integer number (231120).

Almost surely, 2^3645290 is an apocalyptic number.

3645290 is an abundant number, since it is smaller than the sum of its proper divisors (3750550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645290 is a wasteful number, since it uses less digits than its factorization.

3645290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 3645290 is about 1909.2642561992. The cubic root of 3645290 is about 153.9019165167.

The spelling of 3645290 in words is "three million, six hundred forty-five thousand, two hundred ninety".