28666600 has 24 divisors (see below), whose sum is σ = 66650310. Its totient is φ = 11466560.

The previous prime is 28666591. The next prime is 28666609. The reversal of 28666600 is 666682.

It is an interprime number because it is at equal distance from previous prime (28666591) and next prime (28666609).

It can be written as a sum of positive squares in 3 ways, for example, as 11410884 + 17255716 = 3378^2 + 4154^2 .

It is not an unprimeable number, because it can be changed into a prime (28666609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71467 + ... + 71866.

Almost surely, 2^28666600 is an apocalyptic number.

28666600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28666600 is an abundant number, since it is smaller than the sum of its proper divisors (37983710).

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

28666600 is a wasteful number, since it uses less digits than its factorization.

28666600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143349 (or 143340 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28666600 is about 5354.1199090047. The cubic root of 28666600 is about 306.0497733266.

The spelling of 28666600 in words is "twenty-eight million, six hundred sixty-six thousand, six hundred".