3810820 has 24 divisors (see below), whose sum is σ = 8618904. Its totient is φ = 1406976.

The previous prime is 3810817. The next prime is 3810823. The reversal of 3810820 is 280183.

It is an interprime number because it is at equal distance from previous prime (3810817) and next prime (3810823).

It can be written as a sum of positive squares in 4 ways, for example, as 831744 + 2979076 = 912^2 + 1726^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3810791 and 3810800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3810823) 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, 7069 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (359121).

Almost surely, 2^3810820 is an apocalyptic number.

It is an amenable number.

3810820 is an abundant number, since it is smaller than the sum of its proper divisors (4808084).

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

3810820 is a wasteful number, since it uses less digits than its factorization.

3810820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14679 (or 14677 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 3810820 is about 1952.1321676567. The cubic root of 3810820 is about 156.1970444546.

The spelling of 3810820 in words is "three million, eight hundred ten thousand, eight hundred twenty".