28351100 has 18 divisors (see below), whose sum is σ = 61522104. Its totient is φ = 11340400.

The previous prime is 28351069. The next prime is 28351109. The reversal of 28351100 is 115382.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141656 + ... + 141855.

Almost surely, 2^28351100 is an apocalyptic number.

28351100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28351100 is an abundant number, since it is smaller than the sum of its proper divisors (33171004).

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

28351100 is a wasteful number, since it uses less digits than its factorization.

28351100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283525 (or 283518 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 28351100 is about 5324.5751004188. The cubic root of 28351100 is about 304.9228506830.

Adding to 28351100 its reverse (115382), we get a palindrome (28466482).

The spelling of 28351100 in words is "twenty-eight million, three hundred fifty-one thousand, one hundred".