28237785938 has 16 divisors (see below), whose sum is σ = 42418335960. Its totient is φ = 14098358400.

The previous prime is 28237785937. The next prime is 28237786043. The reversal of 28237785938 is 83958773282.

It can be written as a sum of positive squares in 4 ways, for example, as 21025870009 + 7211915929 = 145003^2 + 84923^2 .

It is not an unprimeable number, because it can be changed into a prime (28237785937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4915748 + ... + 4921488.

Almost surely, 2^28237785938 is an apocalyptic number.

28237785938 is a deficient number, since it is larger than the sum of its proper divisors (14180550022).

28237785938 is a wasteful number, since it uses less digits than its factorization.

28237785938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8893.

The product of its digits is 40642560, while the sum is 62.

The spelling of 28237785938 in words is "twenty-eight billion, two hundred thirty-seven million, seven hundred eighty-five thousand, nine hundred thirty-eight".