491705442 has 12 divisors (see below), whose sum is σ = 1065361830. Its totient is φ = 163901808.

The previous prime is 491705441. The next prime is 491705449. The reversal of 491705442 is 244507194.

It is a happy number.

491705442 is a `hidden beast` number, since 49 + 1 + 70 + 544 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 418243401 + 73462041 = 20451^2 + 8571^2 .

It is a junction number, because it is equal to n+sod(n) for n = 491705397 and 491705406.

It is not an unprimeable number, because it can be changed into a prime (491705441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13658467 + ... + 13658502.

Almost surely, 2^491705442 is an apocalyptic number.

491705442 is an abundant number, since it is smaller than the sum of its proper divisors (573656388).

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

491705442 is a wasteful number, since it uses less digits than its factorization.

491705442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27316977 (or 27316974 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 491705442 is about 22174.4321686036. The cubic root of 491705442 is about 789.2871002866.

The spelling of 491705442 in words is "four hundred ninety-one million, seven hundred five thousand, four hundred forty-two".