865616472 has 192 divisors, whose sum is σ = 2929305600. Its totient is φ = 225192960.

The previous prime is 865616467. The next prime is 865616501. The reversal of 865616472 is 274616568.

865616472 is a `hidden beast` number, since 86 + 561 + 6 + 4 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263979 + ... + 267237.

It is an arithmetic number, because the mean of its divisors is an integer number (15256800).

Almost surely, 2^865616472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865616472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464652800).

865616472 is an abundant number, since it is smaller than the sum of its proper divisors (2063689128).

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

865616472 is a wasteful number, since it uses less digits than its factorization.

865616472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326 (or 3319 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 865616472 is about 29421.3608114920. The cubic root of 865616472 is about 953.0342401540.

The spelling of 865616472 in words is "eight hundred sixty-five million, six hundred sixteen thousand, four hundred seventy-two".