28916527540 has 24 divisors (see below), whose sum is σ = 60746053032. Its totient is φ = 11562545280.

The previous prime is 28916527537. The next prime is 28916527543. The reversal of 28916527540 is 4572561982.

It is an interprime number because it is at equal distance from previous prime (28916527537) and next prime (28916527543).

It can be written as a sum of positive squares in 4 ways, for example, as 1576566436 + 27339961104 = 39706^2 + 165348^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916527543) 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, 195459 + ... + 309898.

It is an arithmetic number, because the mean of its divisors is an integer number (2531085543).

Almost surely, 2^28916527540 is an apocalyptic number.

28916527540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28916527540 is an abundant number, since it is smaller than the sum of its proper divisors (31829525492).

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

28916527540 is a wasteful number, since it uses less digits than its factorization.

28916527540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508227 (or 508225 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 28916527540 in words is "twenty-eight billion, nine hundred sixteen million, five hundred twenty-seven thousand, five hundred forty".