3640842 has 32 divisors (see below), whose sum is σ = 8156160. Its totient is φ = 1203840.

The previous prime is 3640829. The next prime is 3640843. The reversal of 3640842 is 2480463.

3640842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3640843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10138 + ... + 10490.

It is an arithmetic number, because the mean of its divisors is an integer number (254880).

Almost surely, 2^3640842 is an apocalyptic number.

3640842 is an abundant number, since it is smaller than the sum of its proper divisors (4515318).

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

3640842 is a wasteful number, since it uses less digits than its factorization.

3640842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 3640842 is about 1908.0990540326. The cubic root of 3640842 is about 153.8392937582.

The spelling of 3640842 in words is "three million, six hundred forty thousand, eight hundred forty-two".