442555440 has 40 divisors (see below), whose sum is σ = 1371922608. Its totient is φ = 118014720.

The previous prime is 442555439. The next prime is 442555469. The reversal of 442555440 is 44555244.

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

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, 921751 + ... + 922230.

Almost surely, 2^442555440 is an apocalyptic number.

442555440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442555440 is an abundant number, since it is smaller than the sum of its proper divisors (929367168).

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

442555440 is a wasteful number, since it uses less digits than its factorization.

442555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843997 (or 1843991 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 33.

The square root of 442555440 is about 21037.0016875029. The cubic root of 442555440 is about 762.0601078231.

The spelling of 442555440 in words is "four hundred forty-two million, five hundred fifty-five thousand, four hundred forty".