28268612 has 6 divisors (see below), whose sum is σ = 49470078. Its totient is φ = 14134304.

The previous prime is 28268609. The next prime is 28268623. The reversal of 28268612 is 21686282.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 13645636 = 3824^2 + 3694^2 .

It is a super-2 number, since 2×28268612² = 1598228848813088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3533573 + ... + 3533580.

It is an arithmetic number, because the mean of its divisors is an integer number (8245013).

Almost surely, 2^28268612 is an apocalyptic number.

It is an amenable number.

28268612 is a deficient number, since it is larger than the sum of its proper divisors (21201466).

28268612 is a wasteful number, since it uses less digits than its factorization.

28268612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067157 (or 7067155 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 28268612 is about 5316.8234877603. The cubic root of 28268612 is about 304.6268373659.

The spelling of 28268612 in words is "twenty-eight million, two hundred sixty-eight thousand, six hundred twelve".