28218348 has 24 divisors (see below), whose sum is σ = 73158960. Its totient is φ = 9406080.

The previous prime is 28218347. The next prime is 28218349. The reversal of 28218348 is 84381282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28218347) and next prime (28218349).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28218341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130533 + ... + 130748.

It is an arithmetic number, because the mean of its divisors is an integer number (3048290).

Almost surely, 2^28218348 is an apocalyptic number.

It is an amenable number.

28218348 is an abundant number, since it is smaller than the sum of its proper divisors (44940612).

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

28218348 is a wasteful number, since it uses less digits than its factorization.

28218348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261294 (or 261286 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 28218348 is about 5312.0945021714. The cubic root of 28218348 is about 304.4461794270.

The spelling of 28218348 in words is "twenty-eight million, two hundred eighteen thousand, three hundred forty-eight".