28775070774 has 64 divisors (see below), whose sum is σ = 67748460480. Its totient is φ = 9021818880.

The previous prime is 28775070767. The next prime is 28775070787. The reversal of 28775070774 is 47707057782.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28775070774.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1600314 + ... + 1618194.

It is an arithmetic number, because the mean of its divisors is an integer number (1058569695).

Almost surely, 2^28775070774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28775070774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33874230240).

28775070774 is an abundant number, since it is smaller than the sum of its proper divisors (38973389706).

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

28775070774 is a wasteful number, since it uses less digits than its factorization.

28775070774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19662 (or 19656 counting only the distinct ones).

The product of its (nonzero) digits is 5378240, while the sum is 54.

The spelling of 28775070774 in words is "twenty-eight billion, seven hundred seventy-five million, seventy thousand, seven hundred seventy-four".