202438636828 has 6 divisors (see below), whose sum is σ = 354267614456. Its totient is φ = 101219318412.

The previous prime is 202438636823. The next prime is 202438636837. The reversal of 202438636828 is 828636834202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202438636823) 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 as a sum of consecutive naturals, namely, 25304829600 + ... + 25304829607.

Almost surely, 2^202438636828 is an apocalyptic number.

It is an amenable number.

202438636828 is a deficient number, since it is larger than the sum of its proper divisors (151828977628).

202438636828 is a wasteful number, since it uses less digits than its factorization.

202438636828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50609659211 (or 50609659209 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 52.

The spelling of 202438636828 in words is "two hundred two billion, four hundred thirty-eight million, six hundred thirty-six thousand, eight hundred twenty-eight".