122028138 has 24 divisors (see below), whose sum is σ = 264727008. Its totient is φ = 40624872.

The previous prime is 122028131. The next prime is 122028149. The reversal of 122028138 is 831820221.

It is a super-3 number, since 3×122028138³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (122028131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12145 + ... + 19787.

It is an arithmetic number, because the mean of its divisors is an integer number (11030292).

Almost surely, 2^122028138 is an apocalyptic number.

122028138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

122028138 is an abundant number, since it is smaller than the sum of its proper divisors (142698870).

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

122028138 is a wasteful number, since it uses less digits than its factorization.

122028138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538 (or 8535 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 122028138 is about 11046.6346911627. The cubic root of 122028138 is about 496.0056933313.

Adding to 122028138 its reverse (831820221), we get a palindrome (953848359).

The spelling of 122028138 in words is "one hundred twenty-two million, twenty-eight thousand, one hundred thirty-eight".