3688402 has 4 divisors (see below), whose sum is σ = 5532606. Its totient is φ = 1844200.

The previous prime is 3688393. The next prime is 3688453. The reversal of 3688402 is 2048863.

It is a happy number.

3688402 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., 3651921 + 36481 = 1911^2 + 191^2 .

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, 922099 + ... + 922102.

Almost surely, 2^3688402 is an apocalyptic number.

3688402 is a deficient number, since it is larger than the sum of its proper divisors (1844204).

3688402 is a wasteful number, since it uses less digits than its factorization.

3688402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844203.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 3688402 is about 1920.5212834020. The cubic root of 3688402 is about 154.5062610269.

The spelling of 3688402 in words is "three million, six hundred eighty-eight thousand, four hundred two".