866402352 has 80 divisors (see below), whose sum is σ = 2491313760. Its totient is φ = 288288000.

The previous prime is 866402333. The next prime is 866402357. The reversal of 866402352 is 253204668.

866402352 is a `hidden beast` number, since 8 + 6 + 640 + 2 + 3 + 5 + 2 = 666.

It is a super-2 number, since 2×866402352² = 1501306071102263808, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (866402357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301402 + ... + 304262.

It is an arithmetic number, because the mean of its divisors is an integer number (31141422).

Almost surely, 2^866402352 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 866402352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245656880).

866402352 is an abundant number, since it is smaller than the sum of its proper divisors (1624911408).

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

866402352 is a wasteful number, since it uses less digits than its factorization.

866402352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 866402352 is about 29434.7133840301. The cubic root of 866402352 is about 953.3225680018.

The spelling of 866402352 in words is "eight hundred sixty-six million, four hundred two thousand, three hundred fifty-two".