28562919840 has 1296 divisors, whose sum is σ = 130702336128. Its totient is φ = 5764442112.

The previous prime is 28562919839. The next prime is 28562919871. The reversal of 28562919840 is 4891926582.

It is a happy number.

28562919840 is a `hidden beast` number, since 2 + 8 + 5 + 629 + 1 + 9 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1296).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 215 ways as a sum of consecutive naturals, for example, 1241866069 + ... + 1241866091.

It is an arithmetic number, because the mean of its divisors is an integer number (100850568).

Almost surely, 2^28562919840 is an apocalyptic number.

28562919840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28562919840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65351168064).

28562919840 is an abundant number, since it is smaller than the sum of its proper divisors (102139416288).

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

28562919840 is an equidigital number, since it uses as much as digits as its factorization.

28562919840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 28562919840 in words is "twenty-eight billion, five hundred sixty-two million, nine hundred nineteen thousand, eight hundred forty".