866145028 has 24 divisors (see below), whose sum is σ = 1732981824. Its totient is φ = 371056800.

The previous prime is 866145023. The next prime is 866145031. The reversal of 866145028 is 820541668.

It is not an unprimeable number, because it can be changed into a prime (866145023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93318 + ... + 102178.

It is an arithmetic number, because the mean of its divisors is an integer number (72207576).

Almost surely, 2^866145028 is an apocalyptic number.

It is an amenable number.

866145028 is an abundant number, since it is smaller than the sum of its proper divisors (866836796).

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

866145028 is a wasteful number, since it uses less digits than its factorization.

866145028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12363 (or 12361 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 866145028 is about 29430.3419619956. The cubic root of 866145028 is about 953.2281788049.

The spelling of 866145028 in words is "eight hundred sixty-six million, one hundred forty-five thousand, twenty-eight".