28628867180 has 48 divisors (see below), whose sum is σ = 60547598496. Its totient is φ = 11370501120.

The previous prime is 28628867167. The next prime is 28628867207. The reversal of 28628867180 is 8176882682.

It is a happy number.

It is a super-2 number, since 2×28628867180² (a number of 22 digits) contains 22 as substring.

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, 1663982 + ... + 1681098.

It is an arithmetic number, because the mean of its divisors is an integer number (1261408302).

Almost surely, 2^28628867180 is an apocalyptic number.

28628867180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28628867180 is an abundant number, since it is smaller than the sum of its proper divisors (31918731316).

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

28628867180 is a wasteful number, since it uses less digits than its factorization.

28628867180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17714 (or 17712 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 56.

The spelling of 28628867180 in words is "twenty-eight billion, six hundred twenty-eight million, eight hundred sixty-seven thousand, one hundred eighty".