28380233 has 8 divisors (see below), whose sum is σ = 32683200. Its totient is φ = 24139440.

The previous prime is 28380227. The next prime is 28380251. The reversal of 28380233 is 33208382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28380233 - 2¹⁰ = 28379209 is a prime.

It is a super-3 number, since 3×28380233³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28380196 and 28380205.

It is not an unprimeable number, because it can be changed into a prime (28380203) 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, 14558 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (4085400).

Almost surely, 2^28380233 is an apocalyptic number.

It is an amenable number.

28380233 is a deficient number, since it is larger than the sum of its proper divisors (4302967).

28380233 is a wasteful number, since it uses less digits than its factorization.

28380233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31087.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 28380233 is about 5327.3101092390. The cubic root of 28380233 is about 305.0272590525.

The spelling of 28380233 in words is "twenty-eight million, three hundred eighty thousand, two hundred thirty-three".