28042969500 has 720 divisors, whose sum is σ = 114720173568. Its totient is φ = 5911315200.

The previous prime is 28042969457. The next prime is 28042969511. The reversal of 28042969500 is 596924082.

28042969500 is a `hidden beast` number, since 2 + 80 + 4 + 2 + 9 + 69 + 500 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 25797957 + ... + 25799043.

Almost surely, 2^28042969500 is an apocalyptic number.

28042969500 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 28042969500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57360086784).

28042969500 is an abundant number, since it is smaller than the sum of its proper divisors (86677204068).

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

28042969500 is a wasteful number, since it uses less digits than its factorization.

28042969500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 28042969500 in words is "twenty-eight billion, forty-two million, nine hundred sixty-nine thousand, five hundred".