3994785 has 32 divisors (see below), whose sum is σ = 7188480. Its totient is φ = 2104704.

The previous prime is 3994777. The next prime is 3994787. The reversal of 3994785 is 5874993.

It is not a de Polignac number, because 3994785 - 2³ = 3994777 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3994785.

It is not an unprimeable number, because it can be changed into a prime (3994787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17029 + ... + 17261.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

Almost surely, 2^3994785 is an apocalyptic number.

It is an amenable number.

3994785 is a deficient number, since it is larger than the sum of its proper divisors (3193695).

3994785 is a wasteful number, since it uses less digits than its factorization.

3994785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 368 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 3994785 is about 1998.6958247818. The cubic root of 3994785 is about 158.6710893910.

It can be divided in two parts, 399 and 4785, that added together give a square (5184 = 72²).

The spelling of 3994785 in words is "three million, nine hundred ninety-four thousand, seven hundred eighty-five".