728260427 has 4 divisors (see below), whose sum is σ = 745196760. Its totient is φ = 711324096.

The previous prime is 728260411. The next prime is 728260451. The reversal of 728260427 is 724062827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724062827 = 17 ⋅42591931.

It is a cyclic number.

It is not a de Polignac number, because 728260427 - 2⁴ = 728260411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728260927) 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 3 ways as a sum of consecutive naturals, for example, 8468102 + ... + 8468187.

It is an arithmetic number, because the mean of its divisors is an integer number (186299190).

Almost surely, 2^728260427 is an apocalyptic number.

728260427 is a deficient number, since it is larger than the sum of its proper divisors (16936333).

728260427 is a wasteful number, since it uses less digits than its factorization.

728260427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16936332.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 728260427 is about 26986.3007283325. The cubic root of 728260427 is about 899.6955459914.

The spelling of 728260427 in words is "seven hundred twenty-eight million, two hundred sixty thousand, four hundred twenty-seven".