866157448 has 24 divisors (see below), whose sum is σ = 1758584250. Its totient is φ = 399764352.

The previous prime is 866157433. The next prime is 866157469. The reversal of 866157448 is 844751668.

It can be written as a sum of positive squares in 3 ways, for example, as 488321604 + 377835844 = 22098^2 + 19438^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 318973 + ... + 321676.

Almost surely, 2^866157448 is an apocalyptic number.

It is an amenable number.

866157448 is an abundant number, since it is smaller than the sum of its proper divisors (892426802).

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

866157448 is a wasteful number, since it uses less digits than its factorization.

866157448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640681 (or 640664 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 866157448 is about 29430.5529679617. The cubic root of 866157448 is about 953.2327350232.

The spelling of 866157448 in words is "eight hundred sixty-six million, one hundred fifty-seven thousand, four hundred forty-eight".