728477 has 2 divisors, whose sum is σ = 728478. Its totient is φ = 728476.

The previous prime is 728471. The next prime is 728489. The reversal of 728477 is 774827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 70756 = 811^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 728477 - 2¹⁴ = 712093 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728477.

It is not a weakly prime, because it can be changed into another prime (728471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364238 + 364239.

It is an arithmetic number, because the mean of its divisors is an integer number (364239).

2⁷²⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

728477 is a deficient number, since it is larger than the sum of its proper divisors (1).

728477 is an equidigital number, since it uses as much as digits as its factorization.

728477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 35.

The square root of 728477 is about 853.5086408467. The cubic root of 728477 is about 89.9784722173.

The spelling of 728477 in words is "seven hundred twenty-eight thousand, four hundred seventy-seven".