442003440 has 40 divisors (see below), whose sum is σ = 1370211408. Its totient is φ = 117867520.

The previous prime is 442003427. The next prime is 442003481. The reversal of 442003440 is 44300244.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920601 + ... + 921080.

Almost surely, 2^442003440 is an apocalyptic number.

442003440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442003440 is an abundant number, since it is smaller than the sum of its proper divisors (928207968).

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

442003440 is a wasteful number, since it uses less digits than its factorization.

442003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841697 (or 1841691 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 442003440 is about 21023.8778535265. The cubic root of 442003440 is about 761.7431364653.

Adding to 442003440 its reverse (44300244), we get a palindrome (486303684).

The spelling of 442003440 in words is "four hundred forty-two million, three thousand, four hundred forty".