442331823 has 32 divisors (see below), whose sum is σ = 639221760. Its totient is φ = 271065600.

The previous prime is 442331819. The next prime is 442331831. The reversal of 442331823 is 328133244.

It is not a de Polignac number, because 442331823 - 2² = 442331819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442331863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406386 + ... + 407472.

It is an arithmetic number, because the mean of its divisors is an integer number (19975680).

Almost surely, 2^442331823 is an apocalyptic number.

442331823 is a deficient number, since it is larger than the sum of its proper divisors (196889937).

442331823 is a wasteful number, since it uses less digits than its factorization.

442331823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287.

The product of its digits is 13824, while the sum is 30.

The square root of 442331823 is about 21031.6861663539. The cubic root of 442331823 is about 761.9317334700.

It can be divided in two parts, 44233 and 1823, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 442331823 in words is "four hundred forty-two million, three hundred thirty-one thousand, eight hundred twenty-three".