660100028 has 12 divisors (see below), whose sum is σ = 1320200112. Its totient is φ = 282900000.

The previous prime is 660100027. The next prime is 660100039. The reversal of 660100028 is 820001066.

660100028 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 660099976 and 660100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660100027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11787473 + ... + 11787528.

It is an arithmetic number, because the mean of its divisors is an integer number (110016676).

Almost surely, 2^660100028 is an apocalyptic number.

It is an amenable number.

660100028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

660100028 is a wasteful number, since it uses less digits than its factorization.

660100028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23575012 (or 23575010 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 660100028 is about 25692.4118758827. The cubic root of 660100028 is about 870.7027518729.

The spelling of 660100028 in words is "six hundred sixty million, one hundred thousand, twenty-eight".