234431440 has 40 divisors (see below), whose sum is σ = 558354888. Its totient is φ = 91484160.

The previous prime is 234431437. The next prime is 234431497. The reversal of 234431440 is 44134432.

It can be written as a sum of positive squares in 4 ways, for example, as 14561856 + 219869584 = 3816^2 + 14828^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32457 + ... + 39016.

Almost surely, 2^234431440 is an apocalyptic number.

234431440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

234431440 is an abundant number, since it is smaller than the sum of its proper divisors (323923448).

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

234431440 is a wasteful number, since it uses less digits than its factorization.

234431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71527 (or 71521 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 234431440 is about 15311.1541041164. The cubic root of 234431440 is about 616.6025054583.

Adding to 234431440 its reverse (44134432), we get a palindrome (278565872).

The spelling of 234431440 in words is "two hundred thirty-four million, four hundred thirty-one thousand, four hundred forty".