28298812 has 12 divisors (see below), whose sum is σ = 52436160. Its totient is φ = 13317056.

The previous prime is 28298801. The next prime is 28298813. The reversal of 28298812 is 21889282.

It is a super-2 number, since 2×28298812² = 1601645521222688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28298813) 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, 208012 + ... + 208147.

It is an arithmetic number, because the mean of its divisors is an integer number (4369680).

Almost surely, 2^28298812 is an apocalyptic number.

It is an amenable number.

28298812 is a deficient number, since it is larger than the sum of its proper divisors (24137348).

28298812 is a wasteful number, since it uses less digits than its factorization.

28298812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416180 (or 416178 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 28298812 is about 5319.6627712666. The cubic root of 28298812 is about 304.7352786805.

The spelling of 28298812 in words is "twenty-eight million, two hundred ninety-eight thousand, eight hundred twelve".