28287163488 has 48 divisors (see below), whose sum is σ = 74542794480. Its totient is φ = 9392357376.

The previous prime is 28287163477. The next prime is 28287163507. The reversal of 28287163488 is 88436178282.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×28287163488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548593 + ... + 597936.

It is an arithmetic number, because the mean of its divisors is an integer number (1552974885).

Almost surely, 2^28287163488 is an apocalyptic number.

It is an amenable number.

28287163488 is an abundant number, since it is smaller than the sum of its proper divisors (46255630992).

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

28287163488 is a wasteful number, since it uses less digits than its factorization.

28287163488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146799 (or 1146791 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 57.

The spelling of 28287163488 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred sixty-three thousand, four hundred eighty-eight".