28475686488 has 32 divisors (see below), whose sum is σ = 71413806960. Its totient is φ = 9461950080.

The previous prime is 28475686483. The next prime is 28475686489. The reversal of 28475686488 is 88468657482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475686483) 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, 1863823 + ... + 1879038.

Almost surely, 2^28475686488 is an apocalyptic number.

It is an amenable number.

28475686488 is an abundant number, since it is smaller than the sum of its proper divisors (42938120472).

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

28475686488 is a wasteful number, since it uses less digits than its factorization.

28475686488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743187 (or 3743183 counting only the distinct ones).

The product of its digits is 165150720, while the sum is 66.

The spelling of 28475686488 in words is "twenty-eight billion, four hundred seventy-five million, six hundred eighty-six thousand, four hundred eighty-eight".