28522973700 has 216 divisors, whose sum is σ = 97502787200. Its totient is φ = 6931941120.

The previous prime is 28522973659. The next prime is 28522973701. The reversal of 28522973700 is 737922582.

28522973700 is a `hidden beast` number, since 2 + 8 + 522 + 97 + 37 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (28522973701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 908871 + ... + 939729.

Almost surely, 2^28522973700 is an apocalyptic number.

28522973700 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 28522973700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48751393600).

28522973700 is an abundant number, since it is smaller than the sum of its proper divisors (68979813500).

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

28522973700 is a wasteful number, since it uses less digits than its factorization.

28522973700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30971 (or 30961 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 28522973700 in words is "twenty-eight billion, five hundred twenty-two million, nine hundred seventy-three thousand, seven hundred".