728702556 has 24 divisors (see below), whose sum is σ = 1709809920. Its totient is φ = 241543152.

The previous prime is 728702551. The next prime is 728702581. The reversal of 728702556 is 655207827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728702551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167476 + ... + 171771.

It is an arithmetic number, because the mean of its divisors is an integer number (71242080).

Almost surely, 2^728702556 is an apocalyptic number.

It is an amenable number.

728702556 is an abundant number, since it is smaller than the sum of its proper divisors (981107364).

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

728702556 is a wasteful number, since it uses less digits than its factorization.

728702556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339433 (or 339431 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 728702556 is about 26994.4912158018. The cubic root of 728702556 is about 899.8775784102.

The spelling of 728702556 in words is "seven hundred twenty-eight million, seven hundred two thousand, five hundred fifty-six".