442287906 has 16 divisors (see below), whose sum is σ = 885950784. Its totient is φ = 147200144.

The previous prime is 442287877. The next prime is 442287919. The reversal of 442287906 is 609782244.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 53085 + ... + 60848.

It is an arithmetic number, because the mean of its divisors is an integer number (55371924).

Almost surely, 2^442287906 is an apocalyptic number.

442287906 is an abundant number, since it is smaller than the sum of its proper divisors (443662878).

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

442287906 is a wasteful number, since it uses less digits than its factorization.

442287906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114585.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 442287906 is about 21030.6420729373. The cubic root of 442287906 is about 761.9065164559.

The spelling of 442287906 in words is "four hundred forty-two million, two hundred eighty-seven thousand, nine hundred six".