28770749784 has 192 divisors, whose sum is σ = 92320300800. Its totient is φ = 7922748672.

The previous prime is 28770749779. The next prime is 28770749789. The reversal of 28770749784 is 48794707782.

It is an interprime number because it is at equal distance from previous prime (28770749779) and next prime (28770749789).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28770749789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1988127 + ... + 2002545.

It is an arithmetic number, because the mean of its divisors is an integer number (480834900).

Almost surely, 2^28770749784 is an apocalyptic number.

28770749784 is a gapful number since it is divisible by the number (24) 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 28770749784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46160150400).

28770749784 is an abundant number, since it is smaller than the sum of its proper divisors (63549551016).

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

28770749784 is a wasteful number, since it uses less digits than its factorization.

28770749784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14582 (or 14575 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 63.

The spelling of 28770749784 in words is "twenty-eight billion, seven hundred seventy million, seven hundred forty-nine thousand, seven hundred eighty-four".