728464531 has 8 divisors (see below), whose sum is σ = 732441600. Its totient is φ = 724497480.

The previous prime is 728464519. The next prime is 728464537. The reversal of 728464531 is 135464827.

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 728464531 - 2⁹ = 728464019 is a prime.

It is a super-2 number, since 2×728464531² = 1061321145850099922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728464537) 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, 176550 + ... + 180628.

It is an arithmetic number, because the mean of its divisors is an integer number (91555200).

Almost surely, 2^728464531 is an apocalyptic number.

728464531 is a deficient number, since it is larger than the sum of its proper divisors (3977069).

728464531 is a wasteful number, since it uses less digits than its factorization.

728464531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009.

The product of its digits is 161280, while the sum is 40.

The square root of 728464531 is about 26990.0820858329. The cubic root of 728464531 is about 899.7795884121.

It can be divided in two parts, 72846 and 4531, that added together give a palindrome (77377).

The spelling of 728464531 in words is "seven hundred twenty-eight million, four hundred sixty-four thousand, five hundred thirty-one".