123435978 has 8 divisors (see below), whose sum is σ = 246871968. Its totient is φ = 41145324.

The previous prime is 123435971. The next prime is 123435979. The reversal of 123435978 is 879534321.

It is a sphenic number, since it is the product of 3 distinct primes.

123435978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123435971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10286326 + ... + 10286337.

It is an arithmetic number, because the mean of its divisors is an integer number (30858996).

Almost surely, 2^123435978 is an apocalyptic number.

123435978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123435978 is a wasteful number, since it uses less digits than its factorization.

123435978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20572668.

The product of its digits is 181440, while the sum is 42.

The square root of 123435978 is about 11110.1745260819. The cubic root of 123435978 is about 497.9058788915.

The spelling of 123435978 in words is "one hundred twenty-three million, four hundred thirty-five thousand, nine hundred seventy-eight".