28057287468 has 48 divisors (see below), whose sum is σ = 74947025664. Its totient is φ = 8002697280.

The previous prime is 28057287437. The next prime is 28057287491. The reversal of 28057287468 is 86478275082.

It is a super-2 number, since 2×28057287468² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235203 + ... + 333818.

It is an arithmetic number, because the mean of its divisors is an integer number (1561396368).

Almost surely, 2^28057287468 is an apocalyptic number.

28057287468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28057287468 is an abundant number, since it is smaller than the sum of its proper divisors (46889738196).

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

28057287468 is a wasteful number, since it uses less digits than its factorization.

28057287468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569622 (or 569620 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 57.

The spelling of 28057287468 in words is "twenty-eight billion, fifty-seven million, two hundred eighty-seven thousand, four hundred sixty-eight".