123388356 has 144 divisors (see below), whose sum is σ = 375172224. Its totient is φ = 30730752.

The previous prime is 123388333. The next prime is 123388361. The reversal of 123388356 is 653883321.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394056 + ... + 394368.

Almost surely, 2^123388356 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 123388356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187586112).

123388356 is an abundant number, since it is smaller than the sum of its proper divisors (251783868).

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

123388356 is a wasteful number, since it uses less digits than its factorization.

123388356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 357 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 123388356 is about 11108.0311486780. The cubic root of 123388356 is about 497.8418394218.

The spelling of 123388356 in words is "one hundred twenty-three million, three hundred eighty-eight thousand, three hundred fifty-six".