28785412134 has 24 divisors (see below), whose sum is σ = 65080063152. Its totient is φ = 9177957360.

The previous prime is 28785412121. The next prime is 28785412147. The reversal of 28785412134 is 43121458782.

28785412134 is a `hidden beast` number, since 2 + 8 + 78 + 541 + 2 + 1 + 34 = 666.

It is an interprime number because it is at equal distance from previous prime (28785412121) and next prime (28785412147).

It is a self number, because there is not a number n which added to its sum of digits gives 28785412134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34764577 + ... + 34765404.

It is an arithmetic number, because the mean of its divisors is an integer number (2711669298).

Almost surely, 2^28785412134 is an apocalyptic number.

28785412134 is an abundant number, since it is smaller than the sum of its proper divisors (36294651018).

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

28785412134 is a wasteful number, since it uses less digits than its factorization.

28785412134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69530012 (or 69530009 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The spelling of 28785412134 in words is "twenty-eight billion, seven hundred eighty-five million, four hundred twelve thousand, one hundred thirty-four".