28898132072 has 32 divisors (see below), whose sum is σ = 54303064200. Its totient is φ = 14417356800.

The previous prime is 28898132071. The next prime is 28898132093. The reversal of 28898132072 is 27023189882.

It can be written as a sum of positive squares in 4 ways, for example, as 9891098116 + 19007033956 = 99454^2 + 137866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28898132072.

It is not an unprimeable number, because it can be changed into a prime (28898132071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9731804 + ... + 9734772.

Almost surely, 2^28898132072 is an apocalyptic number.

It is an amenable number.

28898132072 is a deficient number, since it is larger than the sum of its proper divisors (25404932128).

28898132072 is a wasteful number, since it uses less digits than its factorization.

28898132072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5233 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 28898132072 in words is "twenty-eight billion, eight hundred ninety-eight million, one hundred thirty-two thousand, seventy-two".