728405541 has 10 divisors (see below), whose sum is σ = 1088112102. Its totient is φ = 485603640.

The previous prime is 728405519. The next prime is 728405567. The reversal of 728405541 is 145504827.

728405541 is a `hidden beast` number, since 72 + 8 + 40 + 5 + 541 = 666.

728405541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 646430625 + 81974916 = 25425^2 + 9054^2 .

It is not a de Polignac number, because 728405541 - 2²⁶ = 661296677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728405496 and 728405505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728405141) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4496250 + ... + 4496411.

Almost surely, 2^728405541 is an apocalyptic number.

It is an amenable number.

728405541 is a deficient number, since it is larger than the sum of its proper divisors (359706561).

728405541 is an equidigital number, since it uses as much as digits as its factorization.

728405541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8992673 (or 8992664 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 728405541 is about 26988.9892548795. The cubic root of 728405541 is about 899.7553001416.

The spelling of 728405541 in words is "seven hundred twenty-eight million, four hundred five thousand, five hundred forty-one".