28233412 has 12 divisors (see below), whose sum is σ = 49445676. Its totient is φ = 14106080.

The previous prime is 28233409. The next prime is 28233421. The reversal of 28233412 is 21433282.

It can be written as a sum of positive squares in 2 ways, for example, as 17774656 + 10458756 = 4216^2 + 3234^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9138 + ... + 11830.

It is an arithmetic number, because the mean of its divisors is an integer number (4120473).

Almost surely, 2^28233412 is an apocalyptic number.

It is an amenable number.

28233412 is a deficient number, since it is larger than the sum of its proper divisors (21212264).

28233412 is a wasteful number, since it uses less digits than its factorization.

28233412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318 (or 5316 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 28233412 is about 5313.5122094524. The cubic root of 28233412 is about 304.5003446744.

Adding to 28233412 its reverse (21433282), we get a palindrome (49666694).

The spelling of 28233412 in words is "twenty-eight million, two hundred thirty-three thousand, four hundred twelve".