28050030500 has 24 divisors (see below), whose sum is σ = 61261267704. Its totient is φ = 11220012000.

The previous prime is 28050030497. The next prime is 28050030509. The reversal of 28050030500 is 503005082.

It can be written as a sum of positive squares in 4 ways, for example, as 96196864 + 27953833636 = 9808^2 + 167194^2 .

It is a super-2 number, since 2×28050030500² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28050030509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28049531 + ... + 28050530.

It is an arithmetic number, because the mean of its divisors is an integer number (2552552821).

Almost surely, 2^28050030500 is an apocalyptic number.

28050030500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28050030500 is an abundant number, since it is smaller than the sum of its proper divisors (33211237204).

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

28050030500 is a wasteful number, since it uses less digits than its factorization.

28050030500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56100080 (or 56100068 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 28050030500 its reverse (503005082), we get a palindrome (28553035582).

The spelling of 28050030500 in words is "twenty-eight billion, fifty million, thirty thousand, five hundred".