442087906 has 16 divisors (see below), whose sum is σ = 715817088. Its totient is φ = 203562000.

The previous prime is 442087847. The next prime is 442087937. The reversal of 442087906 is 609780244.

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, 8520 + ... + 30931.

It is an arithmetic number, because the mean of its divisors is an integer number (44738568).

Almost surely, 2^442087906 is an apocalyptic number.

442087906 is a deficient number, since it is larger than the sum of its proper divisors (273729182).

442087906 is a wasteful number, since it uses less digits than its factorization.

442087906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39897.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 442087906 is about 21025.8865687038. The cubic root of 442087906 is about 761.7916559200.

The spelling of 442087906 in words is "four hundred forty-two million, eighty-seven thousand, nine hundred six".