31432842 has 48 divisors (see below), whose sum is σ = 78736320. Its totient is φ = 8876736.

The previous prime is 31432837. The next prime is 31432861. The reversal of 31432842 is 24823413.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9813 + ... + 12615.

It is an arithmetic number, because the mean of its divisors is an integer number (1640340).

Almost surely, 2^31432842 is an apocalyptic number.

It is a pronic number, being equal to 5606×5607.

It is a practical number, because each smaller number is the sum of distinct divisors of 31432842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39368160).

31432842 is an abundant number, since it is smaller than the sum of its proper divisors (47303478).

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

31432842 is a wasteful number, since it uses less digits than its factorization.

31432842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 2904 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 31432842 is about 5606.4999777045. The cubic root of 31432842 is about 315.5933788796.

The spelling of 31432842 in words is "thirty-one million, four hundred thirty-two thousand, eight hundred forty-two".