442256406 has 16 divisors (see below), whose sum is σ = 888960000. Its totient is φ = 146677608.

The previous prime is 442256387. The next prime is 442256429. The reversal of 442256406 is 604652244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184006 + ... + 186393.

It is an arithmetic number, because the mean of its divisors is an integer number (55560000).

Almost surely, 2^442256406 is an apocalyptic number.

442256406 is an abundant number, since it is smaller than the sum of its proper divisors (446703594).

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

442256406 is a wasteful number, since it uses less digits than its factorization.

442256406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370603.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 442256406 is about 21029.8931523677. The cubic root of 442256406 is about 761.8884282192. Note that the first 3 decimals are identical.

The spelling of 442256406 in words is "four hundred forty-two million, two hundred fifty-six thousand, four hundred six".