42891394 has 32 divisors (see below), whose sum is σ = 79511040. Its totient is φ = 16898112.

The previous prime is 42891347. The next prime is 42891413. The reversal of 42891394 is 49319824.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 15 ways as a sum of consecutive naturals, for example, 84012 + ... + 84520.

It is an arithmetic number, because the mean of its divisors is an integer number (2484720).

Almost surely, 2^42891394 is an apocalyptic number.

42891394 is a deficient number, since it is larger than the sum of its proper divisors (36619646).

42891394 is a wasteful number, since it uses less digits than its factorization.

42891394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its digits is 62208, while the sum is 40.

The square root of 42891394 is about 6549.1521588676. The cubic root of 42891394 is about 350.0446038393.

The spelling of 42891394 in words is "forty-two million, eight hundred ninety-one thousand, three hundred ninety-four".