442191057840 has 120 divisors (see below), whose sum is σ = 1697171412768. Its totient is φ = 101072240640.

The previous prime is 442191057817. The next prime is 442191057857. The reversal of 442191057840 is 48750191244.

442191057840 is a `hidden beast` number, since 4 + 4 + 21 + 9 + 10 + 578 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43863121 + ... + 43873200.

Almost surely, 2^442191057840 is an apocalyptic number.

442191057840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442191057840 is an abundant number, since it is smaller than the sum of its proper divisors (1254980354928).

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

442191057840 is a wasteful number, since it uses less digits than its factorization.

442191057840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87736347 (or 87736338 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 442191057840 in words is "four hundred forty-two billion, one hundred ninety-one million, fifty-seven thousand, eight hundred forty".