728531972250 has 32 divisors (see below), whose sum is σ = 1818415804608. Its totient is φ = 194275192400.

The previous prime is 728531972239. The next prime is 728531972303. The reversal of 728531972250 is 52279135827.

It is a junction number, because it is equal to n+sod(n) for n = 728531972193 and 728531972202.

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, 485687232 + ... + 485688731.

It is an arithmetic number, because the mean of its divisors is an integer number (56825493894).

Almost surely, 2^728531972250 is an apocalyptic number.

728531972250 is an abundant number, since it is smaller than the sum of its proper divisors (1089883832358).

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

728531972250 is a wasteful number, since it uses less digits than its factorization.

728531972250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971375983 (or 971375973 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 728531972250 in words is "seven hundred twenty-eight billion, five hundred thirty-one million, nine hundred seventy-two thousand, two hundred fifty".