28062900 has 54 divisors (see below), whose sum is σ = 87964422. Its totient is φ = 7483200.

The previous prime is 28062899. The next prime is 28062907. The reversal of 28062900 is 926082.

It can be written as a sum of positive squares in 3 ways, for example, as 121104 + 27941796 = 348^2 + 5286^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28062907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14691 + ... + 16490.

Almost surely, 2^28062900 is an apocalyptic number.

28062900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28062900 is an abundant number, since it is smaller than the sum of its proper divisors (59901522).

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

28062900 is a wasteful number, since it uses less digits than its factorization.

28062900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31201 (or 31191 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28062900 is about 5297.4427793040. The cubic root of 28062900 is about 303.8861098076.

Adding to 28062900 its reverse (926082), we get a palindrome (28988982).

The spelling of 28062900 in words is "twenty-eight million, sixty-two thousand, nine hundred".