122776878 has 96 divisors (see below), whose sum is σ = 301704192. Its totient is φ = 32590080.

The previous prime is 122776861. The next prime is 122776883. The reversal of 122776878 is 878677221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2612251 + ... + 2612297.

It is an arithmetic number, because the mean of its divisors is an integer number (3142752).

Almost surely, 2^122776878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122776878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150852096).

122776878 is an abundant number, since it is smaller than the sum of its proper divisors (178927314).

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

122776878 is a wasteful number, since it uses less digits than its factorization.

122776878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 137 counting only the distinct ones).

The product of its digits is 526848, while the sum is 48.

The square root of 122776878 is about 11080.4728238465. The cubic root of 122776878 is about 497.0180891008.

The spelling of 122776878 in words is "one hundred twenty-two million, seven hundred seventy-six thousand, eight hundred seventy-eight".