122778324 has 72 divisors (see below), whose sum is σ = 328124160. Its totient is φ = 38630592.

The previous prime is 122778307. The next prime is 122778343. The reversal of 122778324 is 423877221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64474 + ... + 66350.

It is an arithmetic number, because the mean of its divisors is an integer number (4557280).

Almost surely, 2^122778324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122778324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164062080).

122778324 is an abundant number, since it is smaller than the sum of its proper divisors (205345836).

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

122778324 is a wasteful number, since it uses less digits than its factorization.

122778324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989 (or 1984 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 122778324 is about 11080.5380735775. The cubic root of 122778324 is about 497.0200402970.

The spelling of 122778324 in words is "one hundred twenty-two million, seven hundred seventy-eight thousand, three hundred twenty-four".