28134587680 has 48 divisors (see below), whose sum is σ = 66488728824. Its totient is φ = 11250319360.

The previous prime is 28134587671. The next prime is 28134587693. The reversal of 28134587680 is 8678543182.

It can be written as a sum of positive squares in 4 ways, for example, as 19668379536 + 8466208144 = 140244^2 + 92012^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520320 + ... + 571840.

Almost surely, 2^28134587680 is an apocalyptic number.

28134587680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28134587680 is an abundant number, since it is smaller than the sum of its proper divisors (38354141144).

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

28134587680 is a wasteful number, since it uses less digits than its factorization.

28134587680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54949 (or 54941 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 28134587680 in words is "twenty-eight billion, one hundred thirty-four million, five hundred eighty-seven thousand, six hundred eighty".