28426100 has 18 divisors (see below), whose sum is σ = 61684854. Its totient is φ = 11370400.

The previous prime is 28426087. The next prime is 28426121. The reversal of 28426100 is 162482.

It can be written as a sum of positive squares in 3 ways, for example, as 1094116 + 27331984 = 1046^2 + 5228^2 .

It is a super-2 number, since 2×28426100² = 1616086322420000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142031 + ... + 142230.

Almost surely, 2^28426100 is an apocalyptic number.

28426100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28426100 is an abundant number, since it is smaller than the sum of its proper divisors (33258754).

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

28426100 is a wasteful number, since it uses less digits than its factorization.

28426100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284275 (or 284268 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28426100 is about 5331.6132642944. The cubic root of 28426100 is about 305.1914949016.

Adding to 28426100 its reverse (162482), we get a palindrome (28588582).

The spelling of 28426100 in words is "twenty-eight million, four hundred twenty-six thousand, one hundred".