3806920 has 32 divisors (see below), whose sum is σ = 9225720. Its totient is φ = 1405440.

The previous prime is 3806911. The next prime is 3806923. The reversal of 3806920 is 296083.

It can be written as a sum of positive squares in 4 ways, for example, as 964324 + 2842596 = 982^2 + 1686^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3806923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3141 + ... + 4180.

Almost surely, 2^3806920 is an apocalyptic number.

It is an amenable number.

3806920 is an abundant number, since it is smaller than the sum of its proper divisors (5418800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3806920 is a wasteful number, since it uses less digits than its factorization.

3806920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7345 (or 7341 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3806920 is about 1951.1330041799. The cubic root of 3806920 is about 156.1437421557.

The spelling of 3806920 in words is "three million, eight hundred six thousand, nine hundred twenty".