442001340 has 96 divisors (see below), whose sum is σ = 1500145920. Its totient is φ = 107150400.

The previous prime is 442001249. The next prime is 442001347. The reversal of 442001340 is 43100244.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442001347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31266 + ... + 43145.

It is an arithmetic number, because the mean of its divisors is an integer number (15626520).

Almost surely, 2^442001340 is an apocalyptic number.

It is an amenable number.

442001340 is an abundant number, since it is smaller than the sum of its proper divisors (1058144580).

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

442001340 is a wasteful number, since it uses less digits than its factorization.

442001340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74440 (or 74432 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 442001340 is about 21023.8279102546. The cubic root of 442001340 is about 761.7419300922.

Adding to 442001340 its reverse (43100244), we get a palindrome (485101584).

The spelling of 442001340 in words is "four hundred forty-two million, one thousand, three hundred forty".