122790138 has 16 divisors (see below), whose sum is σ = 246001536. Its totient is φ = 40859840.

The previous prime is 122790127. The next prime is 122790139. The reversal of 122790138 is 831097221.

It is a junction number, because it is equal to n+sod(n) for n = 122790099 and 122790108.

It is not an unprimeable number, because it can be changed into a prime (122790139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13698 + ... + 20813.

It is an arithmetic number, because the mean of its divisors is an integer number (15375096).

Almost surely, 2^122790138 is an apocalyptic number.

122790138 is an abundant number, since it is smaller than the sum of its proper divisors (123211398).

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

122790138 is a wasteful number, since it uses less digits than its factorization.

122790138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35109.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 122790138 is about 11081.0711576093. The cubic root of 122790138 is about 497.0359812391.

The spelling of 122790138 in words is "one hundred twenty-two million, seven hundred ninety thousand, one hundred thirty-eight".