28030250500 has 48 divisors (see below), whose sum is σ = 69963513984. Its totient is φ = 9610370400.

The previous prime is 28030250497. The next prime is 28030250519. The reversal of 28030250500 is 505203082.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4000822 + ... + 4007821.

It is an arithmetic number, because the mean of its divisors is an integer number (1457573208).

Almost surely, 2^28030250500 is an apocalyptic number.

28030250500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28030250500 is an abundant number, since it is smaller than the sum of its proper divisors (41933263484).

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

28030250500 is a wasteful number, since it uses less digits than its factorization.

28030250500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8008669 (or 8008657 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 28030250500 its reverse (505203082), we get a palindrome (28535453582).

The spelling of 28030250500 in words is "twenty-eight billion, thirty million, two hundred fifty thousand, five hundred".