728548399 has 2 divisors, whose sum is σ = 728548400. Its totient is φ = 728548398.

The previous prime is 728548367. The next prime is 728548417. The reversal of 728548399 is 993845827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728548399 - 2⁵ = 728548367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728548199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364274199 + 364274200.

It is an arithmetic number, because the mean of its divisors is an integer number (364274200).

Almost surely, 2^728548399 is an apocalyptic number.

728548399 is a deficient number, since it is larger than the sum of its proper divisors (1).

728548399 is an equidigital number, since it uses as much as digits as its factorization.

728548399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The square root of 728548399 is about 26991.6357229420. The cubic root of 728548399 is about 899.8141175783.

The spelling of 728548399 in words is "seven hundred twenty-eight million, five hundred forty-eight thousand, three hundred ninety-nine".