3809902 has 4 divisors (see below), whose sum is σ = 5714856. Its totient is φ = 1904950.

The previous prime is 3809891. The next prime is 3809903. The reversal of 3809902 is 2099083.

It is a happy number.

3809902 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 Smith number, since the sum of its digits (31) 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 not an unprimeable number, because it can be changed into a prime (3809903) 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, 952474 + ... + 952477.

It is an arithmetic number, because the mean of its divisors is an integer number (1428714).

Almost surely, 2^3809902 is an apocalyptic number.

3809902 is a deficient number, since it is larger than the sum of its proper divisors (1904954).

3809902 is a wasteful number, since it uses less digits than its factorization.

3809902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904953.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 3809902 is about 1951.8970259724. The cubic root of 3809902 is about 156.1845011872.

The spelling of 3809902 in words is "three million, eight hundred nine thousand, nine hundred two".