442021420 has 48 divisors (see below), whose sum is σ = 984674880. Its totient is φ = 166098944.

The previous prime is 442021409. The next prime is 442021423. The reversal of 442021420 is 24120244.

It is not an unprimeable number, because it can be changed into a prime (442021423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274257 + ... + 275863.

It is an arithmetic number, because the mean of its divisors is an integer number (20514060).

Almost surely, 2^442021420 is an apocalyptic number.

It is an amenable number.

442021420 is an abundant number, since it is smaller than the sum of its proper divisors (542653460).

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

442021420 is a wasteful number, since it uses less digits than its factorization.

442021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 442021420 is about 21024.3054582072. The cubic root of 442021420 is about 761.7534651601.

Adding to 442021420 its reverse (24120244), we get a palindrome (466141664).

The spelling of 442021420 in words is "four hundred forty-two million, twenty-one thousand, four hundred twenty".