3640342 has 4 divisors (see below), whose sum is σ = 5460516. Its totient is φ = 1820170.

The previous prime is 3640333. The next prime is 3640369. The reversal of 3640342 is 2430463.

3640342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2430463 = 7 ⋅347209.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 910084 + ... + 910087.

It is an arithmetic number, because the mean of its divisors is an integer number (1365129).

Almost surely, 2^3640342 is an apocalyptic number.

3640342 is a deficient number, since it is larger than the sum of its proper divisors (1820174).

3640342 is a wasteful number, since it uses less digits than its factorization.

3640342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820173.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 3640342 is about 1907.9680290822. The cubic root of 3640342 is about 153.8322511411.

The spelling of 3640342 in words is "three million, six hundred forty thousand, three hundred forty-two".