3992805 has 12 divisors (see below), whose sum is σ = 6920940. Its totient is φ = 2129472.

The previous prime is 3992797. The next prime is 3992837. The reversal of 3992805 is 5082993.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 3006756 = 993^2 + 1734^2 .

It is not a de Polignac number, because 3992805 - 2³ = 3992797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3992805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44320 + ... + 44409.

It is an arithmetic number, because the mean of its divisors is an integer number (576745).

Almost surely, 2^3992805 is an apocalyptic number.

It is an amenable number.

3992805 is a deficient number, since it is larger than the sum of its proper divisors (2928135).

3992805 is a wasteful number, since it uses less digits than its factorization.

3992805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88740 (or 88737 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 3992805 is about 1998.2004403963. The cubic root of 3992805 is about 158.6448701512.

It can be divided in two parts, 39 and 92805, that multiplied together give a triangular number (3619395 = T₂₆₉₀).

The spelling of 3992805 in words is "three million, nine hundred ninety-two thousand, eight hundred five".