28494885240 has 256 divisors, whose sum is σ = 100776960000. Its totient is φ = 7136962560.

The previous prime is 28494885239. The next prime is 28494885247. The reversal of 28494885240 is 4258849482.

28494885240 is a `hidden beast` number, since 28 + 4 + 94 + 8 + 8 + 524 + 0 = 666.

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 (28494885247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10996345 + ... + 10998935.

It is an arithmetic number, because the mean of its divisors is an integer number (393660000).

Almost surely, 2^28494885240 is an apocalyptic number.

28494885240 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 28494885240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50388480000).

28494885240 is an abundant number, since it is smaller than the sum of its proper divisors (72282074760).

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

28494885240 is a wasteful number, since it uses less digits than its factorization.

28494885240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 28494885240 in words is "twenty-eight billion, four hundred ninety-four million, eight hundred eighty-five thousand, two hundred forty".