28919698800 has 120 divisors (see below), whose sum is σ = 92683375920. Its totient is φ = 7708262400.

The previous prime is 28919698799. The next prime is 28919698811. The reversal of 28919698800 is 889691982.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3342480 + ... + 3351120.

It is an arithmetic number, because the mean of its divisors is an integer number (772361466).

Almost surely, 2^28919698800 is an apocalyptic number.

28919698800 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 28919698800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46341687960).

28919698800 is an abundant number, since it is smaller than the sum of its proper divisors (63763677120).

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

28919698800 is a wasteful number, since it uses less digits than its factorization.

28919698800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451 (or 11440 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 60.

The spelling of 28919698800 in words is "twenty-eight billion, nine hundred nineteen million, six hundred ninety-eight thousand, eight hundred".