28214406 has 80 divisors (see below), whose sum is σ = 70253568. Its totient is φ = 8391600.

The previous prime is 28214401. The next prime is 28214413. The reversal of 28214406 is 60441282.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28214406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28214401) 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 39 ways as a sum of consecutive naturals, for example, 126411 + ... + 126633.

Almost surely, 2^28214406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28214406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35126784).

28214406 is an abundant number, since it is smaller than the sum of its proper divisors (42039162).

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

28214406 is a wasteful number, since it uses less digits than its factorization.

28214406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28214406 is about 5311.7234491265. The cubic root of 28214406 is about 304.4320020943.

Adding to 28214406 its reverse (60441282), we get a palindrome (88655688).

It can be divided in two parts, 2821 and 4406, that added together give a palindrome (7227).

The spelling of 28214406 in words is "twenty-eight million, two hundred fourteen thousand, four hundred six".