28891428576 has 48 divisors (see below), whose sum is σ = 79831584000. Its totient is φ = 9123608448.

The previous prime is 28891428571. The next prime is 28891428581. The reversal of 28891428576 is 67582419882.

It is an interprime number because it is at equal distance from previous prime (28891428571) and next prime (28891428581).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891428571) 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, 7917976 + ... + 7921623.

It is an arithmetic number, because the mean of its divisors is an integer number (1663158000).

Almost surely, 2^28891428576 is an apocalyptic number.

It is an amenable number.

28891428576 is an abundant number, since it is smaller than the sum of its proper divisors (50940155424).

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

28891428576 is a wasteful number, since it uses less digits than its factorization.

28891428576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15839631 (or 15839623 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 60.

The spelling of 28891428576 in words is "twenty-eight billion, eight hundred ninety-one million, four hundred twenty-eight thousand, five hundred seventy-six".