42891312 has 40 divisors (see below), whose sum is σ = 112215040. Its totient is φ = 14114880.

The previous prime is 42891293. The next prime is 42891347. The reversal of 42891312 is 21319824.

It is a self number, because there is not a number n which added to its sum of digits gives 42891312.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1864 + ... + 9447.

It is an arithmetic number, because the mean of its divisors is an integer number (2805376).

Almost surely, 2^42891312 is an apocalyptic number.

It is an amenable number.

42891312 is an abundant number, since it is smaller than the sum of its proper divisors (69323728).

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

42891312 is a wasteful number, since it uses less digits than its factorization.

42891312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11401 (or 11395 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 42891312 is about 6549.1458985123. The cubic root of 42891312 is about 350.0443807667.

The spelling of 42891312 in words is "forty-two million, eight hundred ninety-one thousand, three hundred twelve".