31234432 has 32 divisors (see below), whose sum is σ = 62546400. Its totient is φ = 15536640.

The previous prime is 31234417. The next prime is 31234433. The reversal of 31234432 is 23443213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30082 + ... + 31102.

It is an arithmetic number, because the mean of its divisors is an integer number (1954575).

Almost surely, 2^31234432 is an apocalyptic number.

31234432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31234432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31273200).

31234432 is an abundant number, since it is smaller than the sum of its proper divisors (31311968).

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

31234432 is a wasteful number, since it uses less digits than its factorization.

31234432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1262 counting only the distinct ones).

The product of its digits is 1728, while the sum is 22.

The square root of 31234432 is about 5588.7773260347. Note that the first 3 decimals coincide. The cubic root of 31234432 is about 314.9279485832.

Adding to 31234432 its reverse (23443213), we get a palindrome (54677645).

The spelling of 31234432 in words is "thirty-one million, two hundred thirty-four thousand, four hundred thirty-two".