3820415805 has 24 divisors (see below), whose sum is σ = 6909971328. Its totient is φ = 1948965216.

The previous prime is 3820415803. The next prime is 3820415813. The reversal of 3820415805 is 5085140283.

It is a happy number.

3820415805 is a `hidden beast` number, since 38 + 2 + 0 + 41 + 580 + 5 = 666.

It is not a de Polignac number, because 3820415805 - 2¹ = 3820415803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3820415805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820415803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1844577 + ... + 1846646.

It is an arithmetic number, because the mean of its divisors is an integer number (287915472).

Almost surely, 2^3820415805 is an apocalyptic number.

It is an amenable number.

3820415805 is a deficient number, since it is larger than the sum of its proper divisors (3089555523).

3820415805 is a wasteful number, since it uses less digits than its factorization.

3820415805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691257 (or 3691254 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 3820415805 is about 61809.5122533741. The cubic root of 3820415805 is about 1563.2803814209.

The spelling of 3820415805 in words is "three billion, eight hundred twenty million, four hundred fifteen thousand, eight hundred five".