28491584700 has 144 divisors (see below), whose sum is σ = 84645582336. Its totient is φ = 7394956800.

The previous prime is 28491584683. The next prime is 28491584761. The reversal of 28491584700 is 748519482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28491584700.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 5692399 + ... + 5697401.

It is an arithmetic number, because the mean of its divisors is an integer number (587816544).

Almost surely, 2^28491584700 is an apocalyptic number.

28491584700 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 28491584700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42322791168).

28491584700 is an abundant number, since it is smaller than the sum of its proper divisors (56153997636).

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

28491584700 is a wasteful number, since it uses less digits than its factorization.

28491584700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524 (or 5517 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 28491584700 in words is "twenty-eight billion, four hundred ninety-one million, five hundred eighty-four thousand, seven hundred".