28664602440 has 64 divisors (see below), whose sum is σ = 86105332800. Its totient is φ = 7633980672.

The previous prime is 28664602427. The next prime is 28664602459. The reversal of 28664602440 is 4420646682.

It is a junction number, because it is equal to n+sod(n) for n = 28664602392 and 28664602401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61750 + ... + 247269.

It is an arithmetic number, because the mean of its divisors is an integer number (1345395825).

Almost surely, 2^28664602440 is an apocalyptic number.

28664602440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28664602440 is an abundant number, since it is smaller than the sum of its proper divisors (57440730360).

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

28664602440 is a wasteful number, since it uses less digits than its factorization.

28664602440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309806 (or 309802 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 42.

The spelling of 28664602440 in words is "twenty-eight billion, six hundred sixty-four million, six hundred two thousand, four hundred forty".