28332681 has 48 divisors (see below), whose sum is σ = 44271360. Its totient is φ = 16074240.

The previous prime is 28332679. The next prime is 28332709. The reversal of 28332681 is 18623382.

It is not a de Polignac number, because 28332681 - 2¹ = 28332679 is a prime.

It is a super-3 number, since 3×28332681³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28332611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 602800 + ... + 602846.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^28332681 is an apocalyptic number.

It is an amenable number.

28332681 is a deficient number, since it is larger than the sum of its proper divisors (15938679).

28332681 is a wasteful number, since it uses less digits than its factorization.

28332681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 133 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 28332681 is about 5322.8451978242. The cubic root of 28332681 is about 304.8568027966.

The spelling of 28332681 in words is "twenty-eight million, three hundred thirty-two thousand, six hundred eighty-one".