3900838 has 4 divisors (see below), whose sum is σ = 5851260. Its totient is φ = 1950418.

The previous prime is 3900829. The next prime is 3900839. The reversal of 3900838 is 8380093.

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 (3900839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975208 + ... + 975211.

It is an arithmetic number, because the mean of its divisors is an integer number (1462815).

Almost surely, 2^3900838 is an apocalyptic number.

3900838 is a deficient number, since it is larger than the sum of its proper divisors (1950422).

3900838 is a wasteful number, since it uses less digits than its factorization.

3900838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950421.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3900838 is about 1975.0539233145. The cubic root of 3900838 is about 157.4173648989.

The spelling of 3900838 in words is "three million, nine hundred thousand, eight hundred thirty-eight".