3820420 has 12 divisors (see below), whose sum is σ = 8022924. Its totient is φ = 1528160.

The previous prime is 3820391. The next prime is 3820423. The reversal of 3820420 is 240283.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 2534464 = 1134^2 + 1592^2 .

It is not an unprimeable number, because it can be changed into a prime (3820423) 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, 95491 + ... + 95530.

It is an arithmetic number, because the mean of its divisors is an integer number (668577).

Almost surely, 2^3820420 is an apocalyptic number.

It is an amenable number.

3820420 is an abundant number, since it is smaller than the sum of its proper divisors (4202504).

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

3820420 is a wasteful number, since it uses less digits than its factorization.

3820420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191030 (or 191028 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3820420 is about 1954.5894709631. The cubic root of 3820420 is about 156.3280953606.

The spelling of 3820420 in words is "three million, eight hundred twenty thousand, four hundred twenty".