442824978 has 8 divisors (see below), whose sum is σ = 885649968. Its totient is φ = 147608324.

The previous prime is 442824973. The next prime is 442824989. The reversal of 442824978 is 879428244.

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

442824978 is an admirable number.

It is a super-2 number, since 2×442824978² = 392187922281400968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442824973) 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, 36902076 + ... + 36902087.

It is an arithmetic number, because the mean of its divisors is an integer number (110706246).

Almost surely, 2^442824978 is an apocalyptic number.

442824978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

442824978 is a wasteful number, since it uses less digits than its factorization.

442824978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73804168.

The product of its digits is 1032192, while the sum is 48.

The square root of 442824978 is about 21043.4069960166. The cubic root of 442824978 is about 762.2147871036.

The spelling of 442824978 in words is "four hundred forty-two million, eight hundred twenty-four thousand, nine hundred seventy-eight".