28656670600 has 144 divisors (see below), whose sum is σ = 71280594000. Its totient is φ = 10707607680.

The previous prime is 28656670589. The next prime is 28656670621. The reversal of 28656670600 is 607665682.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4546251 + ... + 4552549.

It is an arithmetic number, because the mean of its divisors is an integer number (495004125).

Almost surely, 2^28656670600 is an apocalyptic number.

28656670600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28656670600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35640297000).

28656670600 is an abundant number, since it is smaller than the sum of its proper divisors (42623923400).

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

28656670600 is a wasteful number, since it uses less digits than its factorization.

28656670600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404 (or 6372 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 28656670600 in words is "twenty-eight billion, six hundred fifty-six million, six hundred seventy thousand, six hundred".