28888581500 has 24 divisors (see below), whose sum is σ = 63092663088. Its totient is φ = 11555432400.

The previous prime is 28888581497. The next prime is 28888581503. The reversal of 28888581500 is 518588882.

It is an interprime number because it is at equal distance from previous prime (28888581497) and next prime (28888581503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888581503) 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, 28888082 + ... + 28889081.

It is an arithmetic number, because the mean of its divisors is an integer number (2628860962).

Almost surely, 2^28888581500 is an apocalyptic number.

28888581500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28888581500 is an abundant number, since it is smaller than the sum of its proper divisors (34204081588).

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

28888581500 is a wasteful number, since it uses less digits than its factorization.

28888581500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57777182 (or 57777170 counting only the distinct ones).

The product of its (nonzero) digits is 1638400, while the sum is 53.

The spelling of 28888581500 in words is "twenty-eight billion, eight hundred eighty-eight million, five hundred eighty-one thousand, five hundred".