28432650664 has 24 divisors (see below), whose sum is σ = 58598285130. Its totient is φ = 12923931680.

The previous prime is 28432650613. The next prime is 28432650667. The reversal of 28432650664 is 46605623482.

It can be written as a sum of positive squares in only one way, i.e., 16501457764 + 11931192900 = 128458^2 + 109230^2 .

It is not an unprimeable number, because it can be changed into a prime (28432650667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14685319 + ... + 14687254.

Almost surely, 2^28432650664 is an apocalyptic number.

It is an amenable number.

28432650664 is an abundant number, since it is smaller than the sum of its proper divisors (30165634466).

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

28432650664 is a wasteful number, since it uses less digits than its factorization.

28432650664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29372601 (or 29372586 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 28432650664 in words is "twenty-eight billion, four hundred thirty-two million, six hundred fifty thousand, six hundred sixty-four".