28202538100 has 72 divisors (see below), whose sum is σ = 66792974976. Its totient is φ = 10250880000.

The previous prime is 28202538041. The next prime is 28202538101. The reversal of 28202538100 is 183520282.

It is a super-2 number, since 2×28202538100² (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 (28202538101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3340885 + ... + 3349315.

It is an arithmetic number, because the mean of its divisors is an integer number (927680208).

Almost surely, 2^28202538100 is an apocalyptic number.

28202538100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28202538100 is an abundant number, since it is smaller than the sum of its proper divisors (38590436876).

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

28202538100 is a wasteful number, since it uses less digits than its factorization.

28202538100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11497 (or 11490 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 28202538100 in words is "twenty-eight billion, two hundred two million, five hundred thirty-eight thousand, one hundred".