3500406 has 48 divisors (see below), whose sum is σ = 9338784. Its totient is φ = 922752.

The previous prime is 3500383. The next prime is 3500407. The reversal of 3500406 is 6040053.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3500407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 570 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (194558).

Almost surely, 2^3500406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3500406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4669392).

3500406 is an abundant number, since it is smaller than the sum of its proper divisors (5838378).

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

3500406 is a wasteful number, since it uses less digits than its factorization.

3500406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 3500406 is about 1870.9371983046. The cubic root of 3500406 is about 151.8353191055.

Adding to 3500406 its reverse (6040053), we get a palindrome (9540459).

The spelling of 3500406 in words is "three million, five hundred thousand, four hundred six".