442403478 has 128 divisors (see below), whose sum is σ = 1146493440. Its totient is φ = 124968960.

The previous prime is 442403473. The next prime is 442403509. The reversal of 442403478 is 874304244.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442403473) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1948801 + ... + 1949027.

It is an arithmetic number, because the mean of its divisors is an integer number (8956980).

Almost surely, 2^442403478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442403478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573246720).

442403478 is an abundant number, since it is smaller than the sum of its proper divisors (704089962).

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

442403478 is a wasteful number, since it uses less digits than its factorization.

442403478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 36.

The square root of 442403478 is about 21033.3895984456. The cubic root of 442403478 is about 761.9728739801.

The spelling of 442403478 in words is "four hundred forty-two million, four hundred three thousand, four hundred seventy-eight".