28227403 has 4 divisors (see below), whose sum is σ = 28486480. Its totient is φ = 27968328.

The previous prime is 28227383. The next prime is 28227413. The reversal of 28227403 is 30472282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30472282 = 2 ⋅15236141.

It is a cyclic number.

It is not a de Polignac number, because 28227403 - 2¹³ = 28219211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28227413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129375 + ... + 129592.

It is an arithmetic number, because the mean of its divisors is an integer number (7121620).

Almost surely, 2^28227403 is an apocalyptic number.

28227403 is a deficient number, since it is larger than the sum of its proper divisors (259077).

28227403 is a wasteful number, since it uses less digits than its factorization.

28227403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259076.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28227403 is about 5312.9467341580. The cubic root of 28227403 is about 304.4787405741.

Adding to 28227403 its reverse (30472282), we get a palindrome (58699685).

The spelling of 28227403 in words is "twenty-eight million, two hundred twenty-seven thousand, four hundred three".