28489269280 has 24 divisors (see below), whose sum is σ = 67305899052. Its totient is φ = 11395707648.

The previous prime is 28489269257. The next prime is 28489269301. The reversal of 28489269280 is 8296298482.

It can be written as a sum of positive squares in 2 ways, for example, as 22833627664 + 5655641616 = 151108^2 + 75204^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89028807 + ... + 89029126.

Almost surely, 2^28489269280 is an apocalyptic number.

28489269280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28489269280 is an abundant number, since it is smaller than the sum of its proper divisors (38816629772).

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

28489269280 is a wasteful number, since it uses less digits than its factorization.

28489269280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178057948 (or 178057940 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 28489269280 in words is "twenty-eight billion, four hundred eighty-nine million, two hundred sixty-nine thousand, two hundred eighty".