728504667 has 24 divisors (see below), whose sum is σ = 1174650048. Its totient is φ = 431247600.

The previous prime is 728504641. The next prime is 728504671. The reversal of 728504667 is 766405827.

It is not a de Polignac number, because 728504667 - 2¹² = 728500571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728504627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81309 + ... + 89822.

It is an arithmetic number, because the mean of its divisors is an integer number (48943752).

Almost surely, 2^728504667 is an apocalyptic number.

728504667 is a deficient number, since it is larger than the sum of its proper divisors (446145381).

728504667 is a wasteful number, since it uses less digits than its factorization.

728504667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171191 (or 171188 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 728504667 is about 26990.8256079728. The cubic root of 728504667 is about 899.7961130740.

The spelling of 728504667 in words is "seven hundred twenty-eight million, five hundred four thousand, six hundred sixty-seven".