538687728 has 60 divisors (see below), whose sum is σ = 1526692960. Its totient is φ = 177285888.

The previous prime is 538687697. The next prime is 538687729. The reversal of 538687728 is 827786835.

538687728 is a `hidden beast` number, since 538 + 6 + 87 + 7 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538687729) 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 11 ways as a sum of consecutive naturals, for example, 12301 + ... + 35052.

Almost surely, 2^538687728 is an apocalyptic number.

It is an amenable number.

538687728 is an abundant number, since it is smaller than the sum of its proper divisors (988005232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

538687728 is a wasteful number, since it uses less digits than its factorization.

538687728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47446 (or 47437 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 538687728 is about 23209.6473045154. The cubic root of 538687728 is about 813.6651102454.

The spelling of 538687728 in words is "five hundred thirty-eight million, six hundred eighty-seven thousand, seven hundred twenty-eight".