442294191 has 24 divisors (see below), whose sum is σ = 644948096. Its totient is φ = 292073040.

The previous prime is 442294187. The next prime is 442294199. The reversal of 442294191 is 191492244.

442294191 is a `hidden beast` number, since 442 + 29 + 4 + 191 = 666.

It is not a de Polignac number, because 442294191 - 2² = 442294187 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442294199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537006 + ... + 537828.

Almost surely, 2^442294191 is an apocalyptic number.

442294191 is a deficient number, since it is larger than the sum of its proper divisors (202653905).

442294191 is a wasteful number, since it uses less digits than its factorization.

442294191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323 (or 1320 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 442294191 is about 21030.7914972309. The cubic root of 442294191 is about 761.9101253870.

The spelling of 442294191 in words is "four hundred forty-two million, two hundred ninety-four thousand, one hundred ninety-one".