864771024 has 160 divisors (see below), whose sum is σ = 2484840960. Its totient is φ = 257508864.

The previous prime is 864771007. The next prime is 864771029. The reversal of 864771024 is 420177468.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864771029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3055587 + ... + 3055869.

It is an arithmetic number, because the mean of its divisors is an integer number (15530256).

Almost surely, 2^864771024 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 864771024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1242420480).

864771024 is an abundant number, since it is smaller than the sum of its proper divisors (1620069936).

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

864771024 is a wasteful number, since it uses less digits than its factorization.

864771024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 864771024 is about 29406.9893732766. The cubic root of 864771024 is about 952.7238627589.

The spelling of 864771024 in words is "eight hundred sixty-four million, seven hundred seventy-one thousand, twenty-four".