3922805 has 4 divisors (see below), whose sum is σ = 4707372. Its totient is φ = 3138240.

The previous prime is 3922781. The next prime is 3922819. The reversal of 3922805 is 5082293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1957201 + 1965604 = 1399^2 + 1402^2 .

It is not a de Polignac number, because 3922805 - 2⁶ = 3922741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392276 + ... + 392285.

It is an arithmetic number, because the mean of its divisors is an integer number (1176843).

Almost surely, 2^3922805 is an apocalyptic number.

It is an amenable number.

3922805 is a deficient number, since it is larger than the sum of its proper divisors (784567).

3922805 is an equidigital number, since it uses as much as digits as its factorization.

3922805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784566.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3922805 is about 1980.6072301191. The cubic root of 3922805 is about 157.7123029298.

The spelling of 3922805 in words is "three million, nine hundred twenty-two thousand, eight hundred five".