866409284 has 36 divisors (see below), whose sum is σ = 1734578244. Its totient is φ = 376352256.

The previous prime is 866409251. The next prime is 866409317. The reversal of 866409284 is 482904668.

It is an interprime number because it is at equal distance from previous prime (866409251) and next prime (866409317).

It can be written as a sum of positive squares in 6 ways, for example, as 52562500 + 813846784 = 7250^2 + 28528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13799 + ... + 43854.

It is an arithmetic number, because the mean of its divisors is an integer number (48182729).

Almost surely, 2^866409284 is an apocalyptic number.

It is an amenable number.

866409284 is an abundant number, since it is smaller than the sum of its proper divisors (868168960).

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

866409284 is a wasteful number, since it uses less digits than its factorization.

866409284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57704 (or 57685 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 866409284 is about 29434.8311359179. The cubic root of 866409284 is about 953.3251104751.

The spelling of 866409284 in words is "eight hundred sixty-six million, four hundred nine thousand, two hundred eighty-four".