28463951880 has 512 divisors, whose sum is σ = 117210240000. Its totient is φ = 5983248384.

The previous prime is 28463951863. The next prime is 28463951881. The reversal of 28463951880 is 8815936482.

28463951880 is a `hidden beast` number, since 2 + 8 + 46 + 3 + 9 + 518 + 80 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28463951881) 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, 50024236 + ... + 50024804.

It is an arithmetic number, because the mean of its divisors is an integer number (228926250).

Almost surely, 2^28463951880 is an apocalyptic number.

28463951880 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 28463951880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58605120000).

28463951880 is an abundant number, since it is smaller than the sum of its proper divisors (88746288120).

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

28463951880 is a wasteful number, since it uses less digits than its factorization.

28463951880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 28463951880 in words is "twenty-eight billion, four hundred sixty-three million, nine hundred fifty-one thousand, eight hundred eighty".