28578774450 has 192 divisors, whose sum is σ = 74978058240. Its totient is φ = 7194432000.

The previous prime is 28578774377. The next prime is 28578774451. The reversal of 28578774450 is 5447787582.

It is not an unprimeable number, because it can be changed into a prime (28578774451) 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, 35325646 + ... + 35326454.

It is an arithmetic number, because the mean of its divisors is an integer number (390510720).

Almost surely, 2^28578774450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28578774450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37489029120).

28578774450 is an abundant number, since it is smaller than the sum of its proper divisors (46399283790).

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

28578774450 is a wasteful number, since it uses less digits than its factorization.

28578774450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 17561600, while the sum is 57.

The spelling of 28578774450 in words is "twenty-eight billion, five hundred seventy-eight million, seven hundred seventy-four thousand, four hundred fifty".