865080000 has 420 divisors, whose sum is σ = 3249366120. Its totient is φ = 228096000.

The previous prime is 865079987. The next prime is 865080019. The reversal of 865080000 is 80568.

865080000 is a `hidden beast` number, since 8 + 650 + 8 + 0 + 0 + 0 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9719956 + ... + 9720044.

It is an arithmetic number, because the mean of its divisors is an integer number (7736586).

Almost surely, 2^865080000 is an apocalyptic number.

865080000 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 865080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624683060).

865080000 is an abundant number, since it is smaller than the sum of its proper divisors (2384286120).

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

865080000 is an frugal number, since it uses more digits than its factorization.

865080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 865080000 is about 29412.2423490627. The cubic root of 865080000 is about 952.8373162044.

The spelling of 865080000 in words is "eight hundred sixty-five million, eighty thousand".