28666485040 has 20 divisors (see below), whose sum is σ = 66649577904. Its totient is φ = 11466593984.

The previous prime is 28666485037. The next prime is 28666485047. The reversal of 28666485040 is 4058466682.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (28666485047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179165452 + ... + 179165611.

Almost surely, 2^28666485040 is an apocalyptic number.

28666485040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28666485040 is an abundant number, since it is smaller than the sum of its proper divisors (37983092864).

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

28666485040 is a wasteful number, since it uses less digits than its factorization.

28666485040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358331076 (or 358331070 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 49.

The spelling of 28666485040 in words is "twenty-eight billion, six hundred sixty-six million, four hundred eighty-five thousand, forty".