728961888 has 24 divisors (see below), whose sum is σ = 1913525208. Its totient is φ = 242987264.

The previous prime is 728961881. The next prime is 728961911. The reversal of 728961888 is 888169827.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728961881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796581 + ... + 3796772.

It is an arithmetic number, because the mean of its divisors is an integer number (79730217).

Almost surely, 2^728961888 is an apocalyptic number.

It is an amenable number.

728961888 is an abundant number, since it is smaller than the sum of its proper divisors (1184563320).

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

728961888 is a wasteful number, since it uses less digits than its factorization.

728961888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593366 (or 7593358 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 57.

The square root of 728961888 is about 26999.2942129975. The cubic root of 728961888 is about 899.9843157761.

The spelling of 728961888 in words is "seven hundred twenty-eight million, nine hundred sixty-one thousand, eight hundred eighty-eight".