3880820 has 24 divisors (see below), whose sum is σ = 8285928. Its totient is φ = 1526400.

The previous prime is 3880817. The next prime is 3880847. The reversal of 3880820 is 280883.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 3671056 = 458^2 + 1916^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 2810.

It is an arithmetic number, because the mean of its divisors is an integer number (345247).

Almost surely, 2^3880820 is an apocalyptic number.

It is an amenable number.

3880820 is an abundant number, since it is smaller than the sum of its proper divisors (4405108).

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

3880820 is a wasteful number, since it uses less digits than its factorization.

3880820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 3880820 is about 1969.9796953268. The cubic root of 3880820 is about 157.1476291349.

The spelling of 3880820 in words is "three million, eight hundred eighty thousand, eight hundred twenty".