442191738 has 16 divisors (see below), whose sum is σ = 884833056. Its totient is φ = 147322320.

The previous prime is 442191727. The next prime is 442191803. The reversal of 442191738 is 837191244.

It is a junction number, because it is equal to n+sod(n) for n = 442191696 and 442191705.

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, 5193 + ... + 30188.

It is an arithmetic number, because the mean of its divisors is an integer number (55302066).

Almost surely, 2^442191738 is an apocalyptic number.

442191738 is an abundant number, since it is smaller than the sum of its proper divisors (442641318).

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

442191738 is a wasteful number, since it uses less digits than its factorization.

442191738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37469.

The product of its digits is 48384, while the sum is 39.

The square root of 442191738 is about 21028.3555705148. The cubic root of 442191738 is about 761.8512912387.

The spelling of 442191738 in words is "four hundred forty-two million, one hundred ninety-one thousand, seven hundred thirty-eight".