28726900 has 18 divisors (see below), whose sum is σ = 62337590. Its totient is φ = 11490720.

The previous prime is 28726897. The next prime is 28726909. The reversal of 28726900 is 962782.

It can be written as a sum of positive squares in 3 ways, for example, as 381924 + 28344976 = 618^2 + 5324^2 .

It is a super-2 number, since 2×28726900² = 1650469567220000, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28726909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143535 + ... + 143734.

Almost surely, 2^28726900 is an apocalyptic number.

28726900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28726900 is an abundant number, since it is smaller than the sum of its proper divisors (33610690).

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

28726900 is a wasteful number, since it uses less digits than its factorization.

28726900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287283 (or 287276 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28726900 is about 5359.7481284105. The cubic root of 28726900 is about 306.2642142507.

The spelling of 28726900 in words is "twenty-eight million, seven hundred twenty-six thousand, nine hundred".