122289816 has 32 divisors (see below), whose sum is σ = 333518400. Its totient is φ = 37057440.

The previous prime is 122289809. The next prime is 122289841. The reversal of 122289816 is 618982221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231346 + ... + 231873.

It is an arithmetic number, because the mean of its divisors is an integer number (10422450).

Almost surely, 2^122289816 is an apocalyptic number.

It is an amenable number.

122289816 is an abundant number, since it is smaller than the sum of its proper divisors (211228584).

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

122289816 is a wasteful number, since it uses less digits than its factorization.

122289816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463239 (or 463235 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 122289816 is about 11058.4725889247. The cubic root of 122289816 is about 496.3599862384.

The spelling of 122289816 in words is "one hundred twenty-two million, two hundred eighty-nine thousand, eight hundred sixteen".