31457442 has 8 divisors (see below), whose sum is σ = 62914896. Its totient is φ = 10485812.

The previous prime is 31457411. The next prime is 31457449. The reversal of 31457442 is 24475413.

It is a sphenic number, since it is the product of 3 distinct primes.

31457442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31457449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621448 + ... + 2621459.

It is an arithmetic number, because the mean of its divisors is an integer number (7864362).

Almost surely, 2^31457442 is an apocalyptic number.

31457442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31457442 is a wasteful number, since it uses less digits than its factorization.

31457442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242912.

The product of its digits is 13440, while the sum is 30.

The square root of 31457442 is about 5608.6934307377. The cubic root of 31457442 is about 315.6756874057.

The spelling of 31457442 in words is "thirty-one million, four hundred fifty-seven thousand, four hundred forty-two".