28001893528 has 32 divisors (see below), whose sum is σ = 61939676160. Its totient is φ = 11613687840.

The previous prime is 28001893523. The next prime is 28001893541. The reversal of 28001893528 is 82539810082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001893523) 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, 8063326 + ... + 8066797.

It is an arithmetic number, because the mean of its divisors is an integer number (1935614880).

Almost surely, 2^28001893528 is an apocalyptic number.

28001893528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28001893528 is an abundant number, since it is smaller than the sum of its proper divisors (33937782632).

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

28001893528 is a wasteful number, since it uses less digits than its factorization.

28001893528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16130167 (or 16130163 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 28001893528 in words is "twenty-eight billion, one million, eight hundred ninety-three thousand, five hundred twenty-eight".