28093488390 has 480 divisors, whose sum is σ = 87356408832. Its totient is φ = 6466521600.

The previous prime is 28093488359. The next prime is 28093488419. The reversal of 28093488390 is 9388439082.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 239 ways as a sum of consecutive naturals, for example, 221208507 + ... + 221208633.

Almost surely, 2^28093488390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28093488390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43678204416).

28093488390 is an abundant number, since it is smaller than the sum of its proper divisors (59262920442).

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

28093488390 is a wasteful number, since it uses less digits than its factorization.

28093488390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 28093488390 in words is "twenty-eight billion, ninety-three million, four hundred eighty-eight thousand, three hundred ninety".