864940734 has 128 divisors (see below), whose sum is σ = 2284584960. Its totient is φ = 237362400.

The previous prime is 864940723. The next prime is 864940753. The reversal of 864940734 is 437049468.

It is a self number, because there is not a number n which added to its sum of digits gives 864940734.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2612949 + ... + 2613279.

It is an arithmetic number, because the mean of its divisors is an integer number (17848320).

Almost surely, 2^864940734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864940734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142292480).

864940734 is an abundant number, since it is smaller than the sum of its proper divisors (1419644226).

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

864940734 is a wasteful number, since it uses less digits than its factorization.

864940734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 864940734 is about 29409.8747702196. The cubic root of 864940734 is about 952.7861822194.

The spelling of 864940734 in words is "eight hundred sixty-four million, nine hundred forty thousand, seven hundred thirty-four".