28255918080 has 192 divisors, whose sum is σ = 97351843680. Its totient is φ = 6955204608.

The previous prime is 28255918063. The next prime is 28255918081. The reversal of 28255918080 is 8081955282.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28255918081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363984 + ... + 434736.

Almost surely, 2^28255918080 is an apocalyptic number.

28255918080 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 28255918080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48675921840).

28255918080 is an abundant number, since it is smaller than the sum of its proper divisors (69095925600).

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

28255918080 is a wasteful number, since it uses less digits than its factorization.

28255918080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70796 (or 70776 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 48.

The spelling of 28255918080 in words is "twenty-eight billion, two hundred fifty-five million, nine hundred eighteen thousand, eighty".