864278016 has 160 divisors (see below), whose sum is σ = 2717349888. Its totient is φ = 238878720.

The previous prime is 864278003. The next prime is 864278017. The reversal of 864278016 is 610872468.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864278017) 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, 332016 + ... + 334608.

Almost surely, 2^864278016 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 864278016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358674944).

864278016 is an abundant number, since it is smaller than the sum of its proper divisors (1853071872).

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

864278016 is a wasteful number, since it uses less digits than its factorization.

864278016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2636 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 864278016 is about 29398.6056812224. The cubic root of 864278016 is about 952.5427783021.

The spelling of 864278016 in words is "eight hundred sixty-four million, two hundred seventy-eight thousand, sixteen".