864933888 has 432 divisors, whose sum is σ = 3075476040. Its totient is φ = 214695936.

The previous prime is 864933869. The next prime is 864933893. The reversal of 864933888 is 888339468.

It is a super-2 number, since 2×864933888² = 1496221261221593088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50878456 + ... + 50878472.

Almost surely, 2^864933888 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 864933888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537738020).

864933888 is an abundant number, since it is smaller than the sum of its proper divisors (2210542152).

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

864933888 is a wasteful number, since it uses less digits than its factorization.

864933888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 42 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 864933888 is about 29409.7583805104. The cubic root of 864933888 is about 952.7836684474.

The spelling of 864933888 in words is "eight hundred sixty-four million, nine hundred thirty-three thousand, eight hundred eighty-eight".