75638538 has 12 divisors (see below), whose sum is σ = 163883538. Its totient is φ = 25212840.

The previous prime is 75638503. The next prime is 75638551. The reversal of 75638538 is 83583657.

75638538 is a `hidden beast` number, since 7 + 5 + 638 + 5 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75637809 + 729 = 8697^2 + 27^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75638493 and 75638502.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2101053 + ... + 2101088.

Almost surely, 2^75638538 is an apocalyptic number.

75638538 is an abundant number, since it is smaller than the sum of its proper divisors (88245000).

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

75638538 is a wasteful number, since it uses less digits than its factorization.

75638538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202149 (or 4202146 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 75638538 is about 8697.0419109028. The cubic root of 75638538 is about 422.9097606072.

It can be divided in two parts, 75638 and 538, that added together give a square (76176 = 276²).

The spelling of 75638538 in words is "seventy-five million, six hundred thirty-eight thousand, five hundred thirty-eight".