442000406 has 8 divisors (see below), whose sum is σ = 663182760. Its totient is φ = 220939488.

The previous prime is 442000399. The next prime is 442000423. The reversal of 442000406 is 604000244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20636 + ... + 36191.

It is an arithmetic number, because the mean of its divisors is an integer number (82897845).

Almost surely, 2^442000406 is an apocalyptic number.

442000406 is a deficient number, since it is larger than the sum of its proper divisors (221182354).

442000406 is a wasteful number, since it uses less digits than its factorization.

442000406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60718.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 442000406 is about 21023.8056973518. The cubic root of 442000406 is about 761.7413935422.

The spelling of 442000406 in words is "four hundred forty-two million, four hundred six", and thus it is an aban number.