866058240 has 136 divisors (see below), whose sum is σ = 2774510928. Its totient is φ = 230686720.

The previous prime is 866058229. The next prime is 866058269. The reversal of 866058240 is 42850668.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982600 + ... + 983480.

Almost surely, 2^866058240 is an apocalyptic number.

866058240 is a gapful number since it is divisible by the number (80) 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 866058240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387255464).

866058240 is an abundant number, since it is smaller than the sum of its proper divisors (1908452688).

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

866058240 is an frugal number, since it uses more digits than its factorization.

866058240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 866058240 is about 29428.8674603696. The cubic root of 866058240 is about 953.1963398219.

The spelling of 866058240 in words is "eight hundred sixty-six million, fifty-eight thousand, two hundred forty".