3640742 has 16 divisors (see below), whose sum is σ = 6570240. Its totient is φ = 1478088.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640742 is 2470463.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6578 + ... + 7109.

It is an arithmetic number, because the mean of its divisors is an integer number (410640).

Almost surely, 2^3640742 is an apocalyptic number.

3640742 is a deficient number, since it is larger than the sum of its proper divisors (2929498).

3640742 is a wasteful number, since it uses less digits than its factorization.

3640742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13715.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 3640742 is about 1908.0728497623. The cubic root of 3640742 is about 153.8378852864.

The spelling of 3640742 in words is "three million, six hundred forty thousand, seven hundred forty-two".