42369978 has 16 divisors (see below), whose sum is σ = 96845760. Its totient is φ = 12105696.

The previous prime is 42369973. The next prime is 42369989. The reversal of 42369978 is 87996324.

It is not an unprimeable number, because it can be changed into a prime (42369973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504363 + ... + 504446.

It is an arithmetic number, because the mean of its divisors is an integer number (6052860).

Almost surely, 2^42369978 is an apocalyptic number.

42369978 is an abundant number, since it is smaller than the sum of its proper divisors (54475782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42369978 is a wasteful number, since it uses less digits than its factorization.

42369978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008821.

The product of its digits is 653184, while the sum is 48.

The square root of 42369978 is about 6509.2225342202. Note that the first 3 decimals coincide. The cubic root of 42369978 is about 348.6203593120.

The spelling of 42369978 in words is "forty-two million, three hundred sixty-nine thousand, nine hundred seventy-eight".