3645879 has 16 divisors (see below), whose sum is σ = 5068800. Its totient is φ = 2328480.

The previous prime is 3645877. The next prime is 3645893. The reversal of 3645879 is 9785463.

It is a happy number.

It is not a de Polignac number, because 3645879 - 2¹ = 3645877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3645879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18222 + ... + 18420.

It is an arithmetic number, because the mean of its divisors is an integer number (316800).

Almost surely, 2^3645879 is an apocalyptic number.

3645879 is a deficient number, since it is larger than the sum of its proper divisors (1422921).

3645879 is a wasteful number, since it uses less digits than its factorization.

3645879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its digits is 181440, while the sum is 42.

The square root of 3645879 is about 1909.4184978679. The cubic root of 3645879 is about 153.9102051437.

The spelling of 3645879 in words is "three million, six hundred forty-five thousand, eight hundred seventy-nine".