866247456 has 48 divisors (see below), whose sum is σ = 2291290848. Its totient is φ = 286540800.

The previous prime is 866247451. The next prime is 866247479. The reversal of 866247456 is 654742668.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is not an unprimeable number, because it can be changed into a prime (866247451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21865 + ... + 47016.

It is an arithmetic number, because the mean of its divisors is an integer number (47735226).

Almost surely, 2^866247456 is an apocalyptic number.

It is an amenable number.

866247456 is an abundant number, since it is smaller than the sum of its proper divisors (1425043392).

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

866247456 is a wasteful number, since it uses less digits than its factorization.

866247456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69025 (or 69017 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 48.

The square root of 866247456 is about 29432.0820874093. The cubic root of 866247456 is about 953.2657527308.

The spelling of 866247456 in words is "eight hundred sixty-six million, two hundred forty-seven thousand, four hundred fifty-six".