28757685474 has 80 divisors (see below), whose sum is σ = 73815358848. Its totient is φ = 8197365888.

The previous prime is 28757685461. The next prime is 28757685521. The reversal of 28757685474 is 47458675782.

It is a happy number.

28757685474 is a `hidden beast` number, since 2 + 8 + 7 + 576 + 8 + 54 + 7 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 461739 + ... + 520305.

Almost surely, 2^28757685474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28757685474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36907679424).

28757685474 is an abundant number, since it is smaller than the sum of its proper divisors (45057673374).

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

28757685474 is a wasteful number, since it uses less digits than its factorization.

28757685474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59021 (or 59012 counting only the distinct ones).

The product of its digits is 105369600, while the sum is 63.

The spelling of 28757685474 in words is "twenty-eight billion, seven hundred fifty-seven million, six hundred eighty-five thousand, four hundred seventy-four".