28337145520 has 20 divisors (see below), whose sum is σ = 65883863520. Its totient is φ = 11334858176.

The previous prime is 28337145511. The next prime is 28337145533. The reversal of 28337145520 is 2554173382.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177107080 + ... + 177107239.

It is an arithmetic number, because the mean of its divisors is an integer number (3294193176).

Almost surely, 2^28337145520 is an apocalyptic number.

28337145520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28337145520 is an abundant number, since it is smaller than the sum of its proper divisors (37546718000).

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

28337145520 is a wasteful number, since it uses less digits than its factorization.

28337145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354214332 (or 354214326 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 28337145520 in words is "twenty-eight billion, three hundred thirty-seven million, one hundred forty-five thousand, five hundred twenty".