28233856 has 32 divisors (see below), whose sum is σ = 64284480. Its totient is φ = 12099840.

The previous prime is 28233853. The next prime is 28233859. The reversal of 28233856 is 65833282.

It is an interprime number because it is at equal distance from previous prime (28233853) and next prime (28233859).

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×28233856³ (a number of 23 digits) contains 333 as substring.

It is a pancake number, because a pancake can be divided into 28233856 parts by 7514 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (28233851) 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, 14860 + ... + 16651.

It is an arithmetic number, because the mean of its divisors is an integer number (2008890).

Almost surely, 2^28233856 is an apocalyptic number.

It is an amenable number.

28233856 is an abundant number, since it is smaller than the sum of its proper divisors (36050624).

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

28233856 is an equidigital number, since it uses as much as digits as its factorization.

28233856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31532 (or 31520 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 28233856 is about 5313.5539895629. The cubic root of 28233856 is about 304.5019408617.

The spelling of 28233856 in words is "twenty-eight million, two hundred thirty-three thousand, eight hundred fifty-six".