28097203100 has 54 divisors (see below), whose sum is σ = 61270969032. Its totient is φ = 11183844000.

The previous prime is 28097203093. The next prime is 28097203103. The reversal of 28097203100 is 130279082.

It is a super-2 number, since 2×28097203100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28097203103) 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, 4448945 + ... + 4455255.

Almost surely, 2^28097203100 is an apocalyptic number.

28097203100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28097203100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30635484516).

28097203100 is an abundant number, since it is smaller than the sum of its proper divisors (33173765932).

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

28097203100 is a wasteful number, since it uses less digits than its factorization.

28097203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747 (or 6529 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 28097203100 in words is "twenty-eight billion, ninety-seven million, two hundred three thousand, one hundred".