3500805 has 48 divisors (see below), whose sum is σ = 7124544. Its totient is φ = 1451520.

The previous prime is 3500803. The next prime is 3500831. The reversal of 3500805 is 5080053.

3500805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3500805 - 2¹ = 3500803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3500803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7869 + ... + 8301.

It is an arithmetic number, because the mean of its divisors is an integer number (148428).

Almost surely, 2^3500805 is an apocalyptic number.

3500805 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3500805 is an abundant number, since it is smaller than the sum of its proper divisors (3623739).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3500805 is a wasteful number, since it uses less digits than its factorization.

3500805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 3500805 is about 1871.0438263173. The cubic root of 3500805 is about 151.8410879592.

Adding to 3500805 its reverse (5080053), we get a palindrome (8580858).

The spelling of 3500805 in words is "three million, five hundred thousand, eight hundred five".