865698240 has 224 divisors, whose sum is σ = 3042245376. Its totient is φ = 206807040.

The previous prime is 865698233. The next prime is 865698241. The reversal of 865698240 is 42896568.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 865698240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865698241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770319 + ... + 771441.

Almost surely, 2^865698240 is an apocalyptic number.

865698240 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 865698240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521122688).

865698240 is an abundant number, since it is smaller than the sum of its proper divisors (2176547136).

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

865698240 is a wasteful number, since it uses less digits than its factorization.

865698240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 865698240 is about 29422.7503812951. The cubic root of 865698240 is about 953.0642477662.

The spelling of 865698240 in words is "eight hundred sixty-five million, six hundred ninety-eight thousand, two hundred forty".