122028538 has 4 divisors (see below), whose sum is σ = 183042810. Its totient is φ = 61014268.

The previous prime is 122028521. The next prime is 122028541. The reversal of 122028538 is 835820221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74597769 + 47430769 = 8637^2 + 6887^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30507133 + ... + 30507136.

Almost surely, 2^122028538 is an apocalyptic number.

122028538 is a deficient number, since it is larger than the sum of its proper divisors (61014272).

122028538 is an equidigital number, since it uses as much as digits as its factorization.

122028538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61014271.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 122028538 is about 11046.6527962094. The cubic root of 122028538 is about 496.0062352884.

Adding to 122028538 its reverse (835820221), we get a palindrome (957848759).

The spelling of 122028538 in words is "one hundred twenty-two million, twenty-eight thousand, five hundred thirty-eight".