234978638 has 16 divisors (see below), whose sum is σ = 365520480. Its totient is φ = 113200416.

The previous prime is 234978631. The next prime is 234978647. The reversal of 234978638 is 836879432.

234978638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234978631) 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, 7793 + ... + 23036.

It is an arithmetic number, because the mean of its divisors is an integer number (22845030).

Almost surely, 2^234978638 is an apocalyptic number.

234978638 is a deficient number, since it is larger than the sum of its proper divisors (130541842).

234978638 is a wasteful number, since it uses less digits than its factorization.

234978638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30971.

The product of its digits is 1741824, while the sum is 50.

The square root of 234978638 is about 15329.0129493063. The cubic root of 234978638 is about 617.0818801259.

The spelling of 234978638 in words is "two hundred thirty-four million, nine hundred seventy-eight thousand, six hundred thirty-eight".