42418978 has 16 divisors (see below), whose sum is σ = 76996224. Its totient is φ = 17110080.

The previous prime is 42418939. The next prime is 42418991. The reversal of 42418978 is 87981424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88878 + ... + 89353.

It is an arithmetic number, because the mean of its divisors is an integer number (4812264).

Almost surely, 2^42418978 is an apocalyptic number.

42418978 is a deficient number, since it is larger than the sum of its proper divisors (34577246).

42418978 is a wasteful number, since it uses less digits than its factorization.

42418978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178257.

The product of its digits is 129024, while the sum is 43.

The square root of 42418978 is about 6512.9853370018. The cubic root of 42418978 is about 348.7546982748.

The spelling of 42418978 in words is "forty-two million, four hundred eighteen thousand, nine hundred seventy-eight".