123022404 has 72 divisors (see below), whose sum is σ = 331400160. Its totient is φ = 38345472.

The previous prime is 123022399. The next prime is 123022411. The reversal of 123022404 is 404220321.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 108987 + ... + 110109.

It is an arithmetic number, because the mean of its divisors is an integer number (4602780).

Almost surely, 2^123022404 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 123022404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165700080).

123022404 is an abundant number, since it is smaller than the sum of its proper divisors (208377756).

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

123022404 is a wasteful number, since it uses less digits than its factorization.

123022404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 123022404 is about 11091.5465107441. The cubic root of 123022404 is about 497.3491764382.

Adding to 123022404 its reverse (404220321), we get a palindrome (527242725).

It can be divided in two parts, 12302 and 2404, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 123022404 in words is "one hundred twenty-three million, twenty-two thousand, four hundred four".