42927878 has 32 divisors (see below), whose sum is σ = 78589440. Its totient is φ = 17176320.

The previous prime is 42927877. The next prime is 42927883. The reversal of 42927878 is 87872924.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42927877) by changing a digit.

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, 17750 + ... + 20022.

It is an arithmetic number, because the mean of its divisors is an integer number (2455920).

Almost surely, 2^42927878 is an apocalyptic number.

42927878 is a deficient number, since it is larger than the sum of its proper divisors (35661562).

42927878 is a wasteful number, since it uses less digits than its factorization.

42927878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372.

The product of its digits is 451584, while the sum is 47.

The square root of 42927878 is about 6551.9369655087. The cubic root of 42927878 is about 350.1438266031.

The spelling of 42927878 in words is "forty-two million, nine hundred twenty-seven thousand, eight hundred seventy-eight".