28287487660 has 48 divisors (see below), whose sum is σ = 63232898400. Its totient is φ = 10599012864.

The previous prime is 28287487619. The next prime is 28287487667. The reversal of 28287487660 is 6678478282.

It is a happy number.

It is a super-3 number, since 3×28287487660³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 28287487595 and 28287487604.

It is not an unprimeable number, because it can be changed into a prime (28287487667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384387 + ... + 452026.

It is an arithmetic number, because the mean of its divisors is an integer number (1317352050).

Almost surely, 2^28287487660 is an apocalyptic number.

28287487660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28287487660 is an abundant number, since it is smaller than the sum of its proper divisors (34945410740).

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

28287487660 is a wasteful number, since it uses less digits than its factorization.

28287487660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836530 (or 836528 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 58.

The spelling of 28287487660 in words is "twenty-eight billion, two hundred eighty-seven million, four hundred eighty-seven thousand, six hundred sixty".