28364284540 has 24 divisors (see below), whose sum is σ = 60688867680. Its totient is φ = 11131643328.

The previous prime is 28364284513. The next prime is 28364284541. The reversal of 28364284540 is 4548246382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364284541) 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 7 ways as a sum of consecutive naturals, for example, 13378320 + ... + 13380439.

It is an arithmetic number, because the mean of its divisors is an integer number (2528702820).

Almost surely, 2^28364284540 is an apocalyptic number.

28364284540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28364284540 is an abundant number, since it is smaller than the sum of its proper divisors (32324583140).

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

28364284540 is a wasteful number, since it uses less digits than its factorization.

28364284540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26758821 (or 26758819 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 46.

The spelling of 28364284540 in words is "twenty-eight billion, three hundred sixty-four million, two hundred eighty-four thousand, five hundred forty".