28091232000 has 1152 divisors, whose sum is σ = 116245059840. Its totient is φ = 6635520000.

The previous prime is 28091231911. The next prime is 28091232007. The reversal of 28091232000 is 23219082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28091232007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 460511970 + ... + 460512030.

It is an arithmetic number, because the mean of its divisors is an integer number (100907170).

Almost surely, 2^28091232000 is an apocalyptic number.

28091232000 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 28091232000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58122529920).

28091232000 is an abundant number, since it is smaller than the sum of its proper divisors (88153827840).

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

28091232000 is a wasteful number, since it uses less digits than its factorization.

28091232000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 28091232000 in words is "twenty-eight billion, ninety-one million, two hundred thirty-two thousand".