28469973312 has 504 divisors, whose sum is σ = 97645740192. Its totient is φ = 8155468800.

The previous prime is 28469973281. The next prime is 28469973317. The reversal of 28469973312 is 21337996482.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28469973317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 61756762 + ... + 61757222.

It is an arithmetic number, because the mean of its divisors is an integer number (193741548).

Almost surely, 2^28469973312 is an apocalyptic number.

28469973312 is a gapful number since it is divisible by the number (22) 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 28469973312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48822870096).

28469973312 is an abundant number, since it is smaller than the sum of its proper divisors (69175766880).

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

28469973312 is a wasteful number, since it uses less digits than its factorization.

28469973312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 496 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 28469973312 in words is "twenty-eight billion, four hundred sixty-nine million, nine hundred seventy-three thousand, three hundred twelve".