28761761574 has 144 divisors (see below), whose sum is σ = 78185435328. Its totient is φ = 7574079744.

The previous prime is 28761761573. The next prime is 28761761603. The reversal of 28761761574 is 47516716782.

28761761574 is a `hidden beast` number, since 2 + 8 + 7 + 6 + 1 + 7 + 61 + 574 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28761761574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761761573) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9824899 + ... + 9827825.

It is an arithmetic number, because the mean of its divisors is an integer number (542954412).

Almost surely, 2^28761761574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28761761574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39092717664).

28761761574 is an abundant number, since it is smaller than the sum of its proper divisors (49423673754).

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

28761761574 is a wasteful number, since it uses less digits than its factorization.

28761761574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3809 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 28761761574 in words is "twenty-eight billion, seven hundred sixty-one million, seven hundred sixty-one thousand, five hundred seventy-four".