42544978 has 8 divisors (see below), whose sum is σ = 72934272. Its totient is φ = 18233556.

The previous prime is 42544973. The next prime is 42544991. The reversal of 42544978 is 87944524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42544973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519450 + ... + 1519477.

It is an arithmetic number, because the mean of its divisors is an integer number (9116784).

Almost surely, 2^42544978 is an apocalyptic number.

42544978 is a deficient number, since it is larger than the sum of its proper divisors (30389294).

42544978 is a wasteful number, since it uses less digits than its factorization.

42544978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038936.

The product of its digits is 322560, while the sum is 43.

The square root of 42544978 is about 6522.6511481145. The cubic root of 42544978 is about 349.0996669393.

The spelling of 42544978 in words is "forty-two million, five hundred forty-four thousand, nine hundred seventy-eight".