28406100 has 36 divisors (see below), whose sum is σ = 82189184. Its totient is φ = 7574880.

The previous prime is 28406087. The next prime is 28406107. The reversal of 28406100 is 160482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28406107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47044 + ... + 47643.

Almost surely, 2^28406100 is an apocalyptic number.

28406100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28406100 is an abundant number, since it is smaller than the sum of its proper divisors (53783084).

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

28406100 is a wasteful number, since it uses less digits than its factorization.

28406100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94704 (or 94697 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28406100 is about 5329.7373293625. The cubic root of 28406100 is about 305.1199026915.

Adding to 28406100 its reverse (160482), we get a palindrome (28566582).

The spelling of 28406100 in words is "twenty-eight million, four hundred six thousand, one hundred".