42881578 has 24 divisors (see below), whose sum is σ = 67877568. Its totient is φ = 20297592.

The previous prime is 42881563. The next prime is 42881623. The reversal of 42881578 is 87518824.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 11 ways as a sum of consecutive naturals, for example, 416275 + ... + 416377.

It is an arithmetic number, because the mean of its divisors is an integer number (2828232).

Almost surely, 2^42881578 is an apocalyptic number.

42881578 is a deficient number, since it is larger than the sum of its proper divisors (24995990).

42881578 is a wasteful number, since it uses less digits than its factorization.

42881578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 195 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 42881578 is about 6548.4027060040. The cubic root of 42881578 is about 350.0178984044.

The spelling of 42881578 in words is "forty-two million, eight hundred eighty-one thousand, five hundred seventy-eight".