442256845 has 4 divisors (see below), whose sum is σ = 530708220. Its totient is φ = 353805472.

The previous prime is 442256821. The next prime is 442256851. The reversal of 442256845 is 548652244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128754409 + 313502436 = 11347^2 + 17706^2 .

It is a cyclic number.

It is not a de Polignac number, because 442256845 - 2⁵ = 442256813 is a prime.

It is a super-2 number, since 2×442256845² = 391182233898708050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442256798 and 442256807.

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, 44225680 + ... + 44225689.

It is an arithmetic number, because the mean of its divisors is an integer number (132677055).

Almost surely, 2^442256845 is an apocalyptic number.

It is an amenable number.

442256845 is a deficient number, since it is larger than the sum of its proper divisors (88451375).

442256845 is an equidigital number, since it uses as much as digits as its factorization.

442256845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88451374.

The product of its digits is 307200, while the sum is 40.

The square root of 442256845 is about 21029.9035898884. The cubic root of 442256845 is about 761.8886803119. Note that the first 3 decimals are identical.

The spelling of 442256845 in words is "four hundred forty-two million, two hundred fifty-six thousand, eight hundred forty-five".