728658707 has 8 divisors (see below), whose sum is σ = 835155456. Its totient is φ = 622762632.

The previous prime is 728658661. The next prime is 728658713. The reversal of 728658707 is 707856827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728658707 - 2⁶ = 728658643 is a prime.

It is a super-2 number, since 2×728658707² = 1061887022573823698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728658757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147563 + ... + 152420.

It is an arithmetic number, because the mean of its divisors is an integer number (104394432).

Almost surely, 2^728658707 is an apocalyptic number.

728658707 is a deficient number, since it is larger than the sum of its proper divisors (106496749).

728658707 is a wasteful number, since it uses less digits than its factorization.

728658707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300337.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The square root of 728658707 is about 26993.6790193556. The cubic root of 728658707 is about 899.8595282821.

The spelling of 728658707 in words is "seven hundred twenty-eight million, six hundred fifty-eight thousand, seven hundred seven".