28858331520 has 384 divisors, whose sum is σ = 106432185600. Its totient is φ = 7189217280.

The previous prime is 28858331519. The next prime is 28858331543. The reversal of 28858331520 is 2513385882.

28858331520 is a `hidden beast` number, since 288 + 58 + 3 + 315 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5175454 + ... + 5181026.

It is an arithmetic number, because the mean of its divisors is an integer number (277167150).

Almost surely, 2^28858331520 is an apocalyptic number.

28858331520 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 28858331520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53216092800).

28858331520 is an abundant number, since it is smaller than the sum of its proper divisors (77573854080).

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

28858331520 is a wasteful number, since it uses less digits than its factorization.

28858331520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658 (or 5643 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 28858331520 in words is "twenty-eight billion, eight hundred fifty-eight million, three hundred thirty-one thousand, five hundred twenty".