3992985 has 24 divisors (see below), whose sum is σ = 7005960. Its totient is φ = 2103552.

The previous prime is 3992959. The next prime is 3992987. The reversal of 3992985 is 5892993.

It can be written as a sum of positive squares in 4 ways, for example, as 488601 + 3504384 = 699^2 + 1872^2 .

It is not a de Polignac number, because 3992985 - 2¹⁰ = 3991961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3992985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992987) 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, 3507 + ... + 4503.

It is an arithmetic number, because the mean of its divisors is an integer number (291915).

Almost surely, 2^3992985 is an apocalyptic number.

It is an amenable number.

3992985 is a deficient number, since it is larger than the sum of its proper divisors (3012975).

3992985 is a wasteful number, since it uses less digits than its factorization.

3992985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1094 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 3992985 is about 1998.2454804153. The cubic root of 3992985 is about 158.6472540766.

The spelling of 3992985 in words is "three million, nine hundred ninety-two thousand, nine hundred eighty-five".