122646778 has 8 divisors (see below), whose sum is σ = 184275072. Its totient is φ = 61221756.

The previous prime is 122646761. The next prime is 122646779. The reversal of 122646778 is 877646221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (122646779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49300 + ... + 51727.

It is an arithmetic number, because the mean of its divisors is an integer number (23034384).

Almost surely, 2^122646778 is an apocalyptic number.

122646778 is a deficient number, since it is larger than the sum of its proper divisors (61628294).

122646778 is a wasteful number, since it uses less digits than its factorization.

122646778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101636.

The product of its digits is 225792, while the sum is 43.

The square root of 122646778 is about 11074.6005797049. The cubic root of 122646778 is about 496.8424726831.

The spelling of 122646778 in words is "one hundred twenty-two million, six hundred forty-six thousand, seven hundred seventy-eight".