865040472 has 80 divisors (see below), whose sum is σ = 2429297640. Its totient is φ = 287587584.

The previous prime is 865040411. The next prime is 865040479. The reversal of 865040472 is 274040568.

865040472 is a `hidden beast` number, since 86 + 504 + 0 + 4 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865040479) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 279043 + ... + 282125.

Almost surely, 2^865040472 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 865040472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214648820).

865040472 is an abundant number, since it is smaller than the sum of its proper divisors (1564257168).

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

865040472 is a wasteful number, since it uses less digits than its factorization.

865040472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 865040472 is about 29411.5703762992. The cubic root of 865040472 is about 952.8228033550.

The spelling of 865040472 in words is "eight hundred sixty-five million, forty thousand, four hundred seventy-two".