238407978 has 8 divisors (see below), whose sum is σ = 476815968. Its totient is φ = 79469324.

The previous prime is 238407943. The next prime is 238407979. The reversal of 238407978 is 879704832.

238407978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

238407978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (238407979) 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, 19867326 + ... + 19867337.

It is an arithmetic number, because the mean of its divisors is an integer number (59601996).

Almost surely, 2^238407978 is an apocalyptic number.

238407978 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.

238407978 is a wasteful number, since it uses less digits than its factorization.

238407978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39734668.

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 238407978 is about 15440.4656017880. The cubic root of 238407978 is about 620.0693453480.

The spelling of 238407978 in words is "two hundred thirty-eight million, four hundred seven thousand, nine hundred seventy-eight".