28964467840 has 128 divisors (see below), whose sum is σ = 86329307520. Its totient is φ = 9027870720.

The previous prime is 28964467811. The next prime is 28964467841. The reversal of 28964467840 is 4876446982.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (28964467841) by changing a digit.

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, 244597 + ... + 343156.

It is an arithmetic number, because the mean of its divisors is an integer number (674447715).

Almost surely, 2^28964467840 is an apocalyptic number.

28964467840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28964467840 is an abundant number, since it is smaller than the sum of its proper divisors (57364839680).

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

28964467840 is a wasteful number, since it uses less digits than its factorization.

28964467840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587790 (or 587778 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 28964467840 in words is "twenty-eight billion, nine hundred sixty-four million, four hundred sixty-seven thousand, eight hundred forty".