728324487 has 16 divisors (see below), whose sum is σ = 1177090560. Its totient is φ = 441408600.

The previous prime is 728324479. The next prime is 728324503. The reversal of 728324487 is 784423827.

728324487 is a `hidden beast` number, since 72 + 83 + 24 + 487 = 666.

It is not a de Polignac number, because 728324487 - 2³ = 728324479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728324407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1225839 + ... + 1226432.

It is an arithmetic number, because the mean of its divisors is an integer number (73568160).

Almost surely, 2^728324487 is an apocalyptic number.

728324487 is a deficient number, since it is larger than the sum of its proper divisors (448766073).

728324487 is a wasteful number, since it uses less digits than its factorization.

728324487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452291 (or 2452285 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 728324487 is about 26987.4876007382. The cubic root of 728324487 is about 899.7219252026.

The spelling of 728324487 in words is "seven hundred twenty-eight million, three hundred twenty-four thousand, four hundred eighty-seven".