728694834 has 64 divisors (see below), whose sum is σ = 1768386816. Its totient is φ = 195416064.

The previous prime is 728694793. The next prime is 728694839. The reversal of 728694834 is 438496827.

It is a super-2 number, since 2×728694834² = 1061992322196575112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (728694839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307984 + ... + 310340.

It is an arithmetic number, because the mean of its divisors is an integer number (27631044).

Almost surely, 2^728694834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728694834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884193408).

728694834 is an abundant number, since it is smaller than the sum of its proper divisors (1039691982).

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

728694834 is a wasteful number, since it uses less digits than its factorization.

728694834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819.

The product of its digits is 2322432, while the sum is 51.

The square root of 728694834 is about 26994.3481862408. The cubic root of 728694834 is about 899.8743997565.

The spelling of 728694834 in words is "seven hundred twenty-eight million, six hundred ninety-four thousand, eight hundred thirty-four".