866213376 has 240 divisors, whose sum is σ = 2846509776. Its totient is φ = 232587264.

The previous prime is 866213357. The next prime is 866213423. The reversal of 866213376 is 673312668.

It is a super-2 number, since 2×866213376² = 1500651225522634752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1279150 + ... + 1279826.

Almost surely, 2^866213376 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 866213376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423254888).

866213376 is an abundant number, since it is smaller than the sum of its proper divisors (1980296400).

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

866213376 is a wasteful number, since it uses less digits than its factorization.

866213376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 706 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 866213376 is about 29431.5031216552. The cubic root of 866213376 is about 953.2532514058.

The spelling of 866213376 in words is "eight hundred sixty-six million, two hundred thirteen thousand, three hundred seventy-six".