28302458778 has 192 divisors, whose sum is σ = 73690767360. Its totient is φ = 8027062560.

The previous prime is 28302458777. The next prime is 28302458791. The reversal of 28302458778 is 87785420382.

28302458778 is a `hidden beast` number, since 2 + 8 + 30 + 24 + 587 + 7 + 8 = 666.

It is a super-3 number, since 3×28302458778³ (a number of 32 digits) contains 333 as substring.

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 (28302458777) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7061251 + ... + 7065257.

It is an arithmetic number, because the mean of its divisors is an integer number (383806080).

Almost surely, 2^28302458778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28302458778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36845383680).

28302458778 is an abundant number, since it is smaller than the sum of its proper divisors (45388308582).

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

28302458778 is a wasteful number, since it uses less digits than its factorization.

28302458778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110 (or 4093 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 28302458778 in words is "twenty-eight billion, three hundred two million, four hundred fifty-eight thousand, seven hundred seventy-eight".