3812820 has 96 divisors (see below), whose sum is σ = 11975040. Its totient is φ = 898560.

The previous prime is 3812819. The next prime is 3812839. The reversal of 3812820 is 282183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34926 + ... + 35034.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

Almost surely, 2^3812820 is an apocalyptic number.

3812820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3812820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5987520).

3812820 is an abundant number, since it is smaller than the sum of its proper divisors (8162220).

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

3812820 is a wasteful number, since it uses less digits than its factorization.

3812820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 3812820 is about 1952.6443608604. The cubic root of 3812820 is about 156.2243648611.

The spelling of 3812820 in words is "three million, eight hundred twelve thousand, eight hundred twenty".