122138628 has 24 divisors (see below), whose sum is σ = 292693632. Its totient is φ = 39612384.

The previous prime is 122138561. The next prime is 122138629. The reversal of 122138628 is 826831221.

It is not an unprimeable number, because it can be changed into a prime (122138629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137100 + ... + 137987.

It is an arithmetic number, because the mean of its divisors is an integer number (12195568).

Almost surely, 2^122138628 is an apocalyptic number.

It is an amenable number.

122138628 is an abundant number, since it is smaller than the sum of its proper divisors (170555004).

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

122138628 is a wasteful number, since it uses less digits than its factorization.

122138628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275131 (or 275129 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 122138628 is about 11051.6346302255. The cubic root of 122138628 is about 496.1553504450.

Adding to 122138628 its reverse (826831221), we get a palindrome (948969849).

The spelling of 122138628 in words is "one hundred twenty-two million, one hundred thirty-eight thousand, six hundred twenty-eight".