28260612 has 18 divisors (see below), whose sum is σ = 71436638. Its totient is φ = 9420192.

The previous prime is 28260599. The next prime is 28260643. The reversal of 28260612 is 21606282.

28260612 is a `hidden beast` number, since 28 + 26 + 0 + 612 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14243076 + 14017536 = 3774^2 + 3744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28260612² = 1597324381229088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392473 + ... + 392544.

Almost surely, 2^28260612 is an apocalyptic number.

It is an amenable number.

28260612 is an abundant number, since it is smaller than the sum of its proper divisors (43176026).

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

28260612 is a wasteful number, since it uses less digits than its factorization.

28260612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785027 (or 785022 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28260612 is about 5316.0711056193. The cubic root of 28260612 is about 304.5980982515.

Adding to 28260612 its reverse (21606282), we get a palindrome (49866894).

The spelling of 28260612 in words is "twenty-eight million, two hundred sixty thousand, six hundred twelve".