3930820 has 12 divisors (see below), whose sum is σ = 8254764. Its totient is φ = 1572320.

The previous prime is 3930811. The next prime is 3930827. The reversal of 3930820 is 280393.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 2815684 = 1056^2 + 1678^2 .

It is not an unprimeable number, because it can be changed into a prime (3930827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98251 + ... + 98290.

It is an arithmetic number, because the mean of its divisors is an integer number (687897).

Almost surely, 2^3930820 is an apocalyptic number.

It is an amenable number.

3930820 is an abundant number, since it is smaller than the sum of its proper divisors (4323944).

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

3930820 is a wasteful number, since it uses less digits than its factorization.

3930820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196550 (or 196548 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 3930820 is about 1982.6295670145. The cubic root of 3930820 is about 157.8196414440.

The spelling of 3930820 in words is "three million, nine hundred thirty thousand, eight hundred twenty".