3639494 has 4 divisors (see below), whose sum is σ = 5459244. Its totient is φ = 1819746.

The previous prime is 3639487. The next prime is 3639499. The reversal of 3639494 is 4949363.

3639494 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639499) 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 as a sum of consecutive naturals, namely, 909872 + ... + 909875.

It is an arithmetic number, because the mean of its divisors is an integer number (1364811).

Almost surely, 2^3639494 is an apocalyptic number.

3639494 is a deficient number, since it is larger than the sum of its proper divisors (1819750).

3639494 is a wasteful number, since it uses less digits than its factorization.

3639494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819749.

The product of its digits is 69984, while the sum is 38.

The square root of 3639494 is about 1907.7457901932. The cubic root of 3639494 is about 153.8203053881.

The spelling of 3639494 in words is "three million, six hundred thirty-nine thousand, four hundred ninety-four".