3640706 has 4 divisors (see below), whose sum is σ = 5461062. Its totient is φ = 1820352.

The previous prime is 3640697. The next prime is 3640711. The reversal of 3640706 is 6070463.

3640706 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.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 1666681 = 1405^2 + 1291^2 .

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, 910175 + ... + 910178.

Almost surely, 2^3640706 is an apocalyptic number.

3640706 is a deficient number, since it is larger than the sum of its proper divisors (1820356).

3640706 is a wasteful number, since it uses less digits than its factorization.

3640706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820355.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 3640706 is about 1908.0634161369. The cubic root of 3640706 is about 153.8373782302.

The spelling of 3640706 in words is "three million, six hundred forty thousand, seven hundred six".