28730017205200 has 60 divisors (see below), whose sum is σ = 69024865770688. Its totient is φ = 11491840483200.

The previous prime is 28730017205147. The next prime is 28730017205231. The reversal of 28730017205200 is 250271003782.

It is a super-2 number, since 2×28730017205200² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28730017205200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29270395 + ... + 30236005.

Almost surely, 2^{28730017205200} is an apocalyptic number.

28730017205200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28730017205200 is an abundant number, since it is smaller than the sum of its proper divisors (40294848565488).

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

28730017205200 is a wasteful number, since it uses less digits than its factorization.

28730017205200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040012 (or 1040001 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 28730017205200 its reverse (250271003782), we get a palindrome (28980288208982).

The spelling of 28730017205200 in words is "twenty-eight trillion, seven hundred thirty billion, seventeen million, two hundred five thousand, two hundred".