28293668 has 12 divisors (see below), whose sum is σ = 53322780. Its totient is φ = 13058592.

The previous prime is 28293667. The next prime is 28293673. The reversal of 28293668 is 86639282.

It can be written as a sum of positive squares in 2 ways, for example, as 3771364 + 24522304 = 1942^2 + 4952^2 .

It is not an unprimeable number, because it can be changed into a prime (28293667) 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, 272003 + ... + 272106.

It is an arithmetic number, because the mean of its divisors is an integer number (4443565).

Almost surely, 2^28293668 is an apocalyptic number.

It is an amenable number.

28293668 is a deficient number, since it is larger than the sum of its proper divisors (25029112).

28293668 is a wasteful number, since it uses less digits than its factorization.

28293668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544126 (or 544124 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 28293668 is about 5319.1792599987. The cubic root of 28293668 is about 304.7168132026.

The spelling of 28293668 in words is "twenty-eight million, two hundred ninety-three thousand, six hundred sixty-eight".