123432378 has 16 divisors (see below), whose sum is σ = 248146176. Its totient is φ = 40930560.

The previous prime is 123432377. The next prime is 123432391. The reversal of 123432378 is 873234321.

It is not an unprimeable number, because it can be changed into a prime (123432373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52138 + ... + 54453.

It is an arithmetic number, because the mean of its divisors is an integer number (15509136).

Almost surely, 2^123432378 is an apocalyptic number.

123432378 is an abundant number, since it is smaller than the sum of its proper divisors (124713798).

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

123432378 is a wasteful number, since it uses less digits than its factorization.

123432378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106789.

The product of its digits is 24192, while the sum is 33.

The square root of 123432378 is about 11110.0125112441. The cubic root of 123432378 is about 497.9010383833.

Adding to 123432378 its reverse (873234321), we get a palindrome (996666699).

The spelling of 123432378 in words is "one hundred twenty-three million, four hundred thirty-two thousand, three hundred seventy-eight".