442438820 has 24 divisors (see below), whose sum is σ = 959094528. Its totient is φ = 171266400.

The previous prime is 442438813. The next prime is 442438823. The reversal of 442438820 is 28834244.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (442438823) 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, 356186 + ... + 357425.

It is an arithmetic number, because the mean of its divisors is an integer number (39962272).

Almost surely, 2^442438820 is an apocalyptic number.

It is an amenable number.

442438820 is an abundant number, since it is smaller than the sum of its proper divisors (516655708).

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

442438820 is a wasteful number, since it uses less digits than its factorization.

442438820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713651 (or 713649 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 35.

The square root of 442438820 is about 21034.2297220507. The cubic root of 442438820 is about 761.9931638509.

The spelling of 442438820 in words is "four hundred forty-two million, four hundred thirty-eight thousand, eight hundred twenty".