728822864450 has 54 divisors (see below), whose sum is σ = 1366076415681. Its totient is φ = 289295585280.

The previous prime is 728822864447. The next prime is 728822864459. The reversal of 728822864450 is 54468228827.

It can be written as a sum of positive squares in 14 ways, for example, as 146456993809 + 582365870641 = 382697^2 + 763129^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=603665.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728822864459) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 947753666 + ... + 947754434.

Almost surely, 2^728822864450 is an apocalyptic number.

728822864450 is a deficient number, since it is larger than the sum of its proper divisors (637253551231).

728822864450 is an frugal number, since it uses more digits than its factorization.

728822864450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 56.

The spelling of 728822864450 in words is "seven hundred twenty-eight billion, eight hundred twenty-two million, eight hundred sixty-four thousand, four hundred fifty".