442006668 has 36 divisors (see below), whose sum is σ = 1117964848. Its totient is φ = 147247200.

The previous prime is 442006657. The next prime is 442006693. The reversal of 442006668 is 866600244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89430 + ... + 94242.

Almost surely, 2^442006668 is an apocalyptic number.

It is an amenable number.

442006668 is an abundant number, since it is smaller than the sum of its proper divisors (675958180).

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

442006668 is a wasteful number, since it uses less digits than its factorization.

442006668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374 (or 7369 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 442006668 is about 21023.9546232387. The cubic root of 442006668 is about 761.7449908256.

The spelling of 442006668 in words is "four hundred forty-two million, six thousand, six hundred sixty-eight".