866447424 has 168 divisors, whose sum is σ = 2679374880. Its totient is φ = 266803200.

The previous prime is 866447419. The next prime is 866447437. The reversal of 866447424 is 424744668.

It is a super-2 number, since 2×866447424² = 1501462277112471552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866447424.

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, 447739 + ... + 449669.

It is an arithmetic number, because the mean of its divisors is an integer number (15948660).

Almost surely, 2^866447424 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 866447424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339687440).

866447424 is an abundant number, since it is smaller than the sum of its proper divisors (1812927456).

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

866447424 is a wasteful number, since it uses less digits than its factorization.

866447424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 1996 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The square root of 866447424 is about 29435.4790006889. The cubic root of 866447424 is about 953.3390989702.

The spelling of 866447424 in words is "eight hundred sixty-six million, four hundred forty-seven thousand, four hundred twenty-four".