491423242 has 8 divisors (see below), whose sum is σ = 738637632. Its totient is φ = 245210700.

The previous prime is 491423209. The next prime is 491423249. The reversal of 491423242 is 242324194.

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

It is a super-3 number, since 3×491423242³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (491423249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249234 + ... + 251197.

It is an arithmetic number, because the mean of its divisors is an integer number (92329704).

Almost surely, 2^491423242 is an apocalyptic number.

491423242 is a deficient number, since it is larger than the sum of its proper divisors (247214390).

491423242 is a wasteful number, since it uses less digits than its factorization.

491423242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500924.

The product of its digits is 13824, while the sum is 31.

The square root of 491423242 is about 22168.0680709890. The cubic root of 491423242 is about 789.1360752858.

The spelling of 491423242 in words is "four hundred ninety-one million, four hundred twenty-three thousand, two hundred forty-two".