442173394 has 8 divisors (see below), whose sum is σ = 714280140. Its totient is φ = 204080016.

The previous prime is 442173341. The next prime is 442173419. The reversal of 442173394 is 493371244.

It can be written as a sum of positive squares in 2 ways, for example, as 441630225 + 543169 = 21015^2 + 737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×442173394² = 391034620722958472, which contains 22 as substring.

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, 8503309 + ... + 8503360.

Almost surely, 2^442173394 is an apocalyptic number.

442173394 is a deficient number, since it is larger than the sum of its proper divisors (272106746).

442173394 is a wasteful number, since it uses less digits than its factorization.

442173394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17006684.

The product of its digits is 72576, while the sum is 37.

The square root of 442173394 is about 21027.9193930355. The cubic root of 442173394 is about 761.8407561456.

It can be divided in two parts, 4421 and 73394, that added together give a triangular number (77815 = T₃₉₄).

The spelling of 442173394 in words is "four hundred forty-two million, one hundred seventy-three thousand, three hundred ninety-four".