234405639 has 24 divisors (see below), whose sum is σ = 386083152. Its totient is φ = 135763200.

The previous prime is 234405631. The next prime is 234405659. The reversal of 234405639 is 936504432.

It is not a de Polignac number, because 234405639 - 2³ = 234405631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234405631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56937 + ... + 60914.

It is an arithmetic number, because the mean of its divisors is an integer number (16086798).

Almost surely, 2^234405639 is an apocalyptic number.

234405639 is a deficient number, since it is larger than the sum of its proper divisors (151677513).

234405639 is a wasteful number, since it uses less digits than its factorization.

234405639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117887 (or 117884 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 234405639 is about 15310.3115252434. The cubic root of 234405639 is about 616.5798839975.

The spelling of 234405639 in words is "two hundred thirty-four million, four hundred five thousand, six hundred thirty-nine".