728156847 has 8 divisors (see below), whose sum is σ = 1059137280. Its totient is φ = 441307160.

The previous prime is 728156831. The next prime is 728156851. The reversal of 728156847 is 748651827.

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 728156847 - 2⁴ = 728156831 is a prime.

It is a super-3 number, since 3×728156847³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 728156796 and 728156805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728156647) 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, 11032647 + ... + 11032712.

It is an arithmetic number, because the mean of its divisors is an integer number (132392160).

Almost surely, 2^728156847 is an apocalyptic number.

728156847 is a deficient number, since it is larger than the sum of its proper divisors (330980433).

728156847 is a wasteful number, since it uses less digits than its factorization.

728156847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22065373.

The product of its digits is 752640, while the sum is 48.

The square root of 728156847 is about 26984.3815382158. The cubic root of 728156847 is about 899.6528896011.

The spelling of 728156847 in words is "seven hundred twenty-eight million, one hundred fifty-six thousand, eight hundred forty-seven".