42347128 has 8 divisors (see below), whose sum is σ = 79400880. Its totient is φ = 21173560.

The previous prime is 42347087. The next prime is 42347167. The reversal of 42347128 is 82174324.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 42347128.

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 as a sum of consecutive naturals, namely, 2646688 + ... + 2646703.

It is an arithmetic number, because the mean of its divisors is an integer number (9925110).

Almost surely, 2^42347128 is an apocalyptic number.

It is an amenable number.

42347128 is a deficient number, since it is larger than the sum of its proper divisors (37053752).

42347128 is a wasteful number, since it uses less digits than its factorization.

42347128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293397 (or 5293393 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 42347128 is about 6507.4670955757. The cubic root of 42347128 is about 348.5576780770.

The spelling of 42347128 in words is "forty-two million, three hundred forty-seven thousand, one hundred twenty-eight".