728861554770 has 32 divisors (see below), whose sum is σ = 1771410366720. Its totient is φ = 191902788480.

The previous prime is 728861554753. The next prime is 728861554781. The reversal of 728861554770 is 77455168827.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153765891 + ... + 153770630.

It is an arithmetic number, because the mean of its divisors is an integer number (55356573960).

Almost surely, 2^728861554770 is an apocalyptic number.

728861554770 is an abundant number, since it is smaller than the sum of its proper divisors (1042548811950).

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

728861554770 is a wasteful number, since it uses less digits than its factorization.

728861554770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307536610.

The product of its (nonzero) digits is 26342400, while the sum is 60.

The spelling of 728861554770 in words is "seven hundred twenty-eight billion, eight hundred sixty-one million, five hundred fifty-four thousand, seven hundred seventy".