728506734 has 16 divisors (see below), whose sum is σ = 1457523072. Its totient is φ = 242750648.

The previous prime is 728506711. The next prime is 728506739. The reversal of 728506734 is 437605827.

728506734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×728506734² = 1061444122966693512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728506739) 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, 1194 + ... + 38189.

It is an arithmetic number, because the mean of its divisors is an integer number (91095192).

Almost surely, 2^728506734 is an apocalyptic number.

728506734 is an abundant number, since it is smaller than the sum of its proper divisors (729016338).

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

728506734 is a wasteful number, since it uses less digits than its factorization.

728506734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42471.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 728506734 is about 26990.8638987343. The cubic root of 728506734 is about 899.7969640760.

The spelling of 728506734 in words is "seven hundred twenty-eight million, five hundred six thousand, seven hundred thirty-four".