865224880 has 160 divisors (see below), whose sum is σ = 2287853568. Its totient is φ = 302054400.

The previous prime is 865224859. The next prime is 865224917. The reversal of 865224880 is 88422568.

It is a super-3 number, since 3×865224880³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1514995 + ... + 1515565.

Almost surely, 2^865224880 is an apocalyptic number.

865224880 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 865224880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143926784).

865224880 is an abundant number, since it is smaller than the sum of its proper divisors (1422628688).

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

865224880 is a wasteful number, since it uses less digits than its factorization.

865224880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The square root of 865224880 is about 29414.7051659540. The cubic root of 865224880 is about 952.8905056453.

The spelling of 865224880 in words is "eight hundred sixty-five million, two hundred twenty-four thousand, eight hundred eighty".