442446406 has 4 divisors (see below), whose sum is σ = 663669612. Its totient is φ = 221223202.

The previous prime is 442446401. The next prime is 442446409. The reversal of 442446406 is 604644244.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442446401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611600 + ... + 110611603.

It is an arithmetic number, because the mean of its divisors is an integer number (165917403).

Almost surely, 2^442446406 is an apocalyptic number.

442446406 is a deficient number, since it is larger than the sum of its proper divisors (221223206).

442446406 is a wasteful number, since it uses less digits than its factorization.

442446406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221223205.

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 442446406 is about 21034.4100463978. The cubic root of 442446406 is about 761.9975188388.

The spelling of 442446406 in words is "four hundred forty-two million, four hundred forty-six thousand, four hundred six".