728465477 has 4 divisors (see below), whose sum is σ = 740407596. Its totient is φ = 716523360.

The previous prime is 728465411. The next prime is 728465527. The reversal of 728465477 is 774564827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774564827 = 20443 ⋅37889.

It can be written as a sum of positive squares in 2 ways, for example, as 48246916 + 680218561 = 6946^2 + 26081^2 .

It is a cyclic number.

It is not a de Polignac number, because 728465477 - 2¹⁴ = 728449093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728465077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5970968 + ... + 5971089.

It is an arithmetic number, because the mean of its divisors is an integer number (185101899).

Almost surely, 2^728465477 is an apocalyptic number.

It is an amenable number.

728465477 is a deficient number, since it is larger than the sum of its proper divisors (11942119).

728465477 is a wasteful number, since it uses less digits than its factorization.

728465477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11942118.

The product of its digits is 2634240, while the sum is 50.

The square root of 728465477 is about 26990.0996107832. The cubic root of 728465477 is about 899.7799779030.

The spelling of 728465477 in words is "seven hundred twenty-eight million, four hundred sixty-five thousand, four hundred seventy-seven".