491942436 has 24 divisors (see below), whose sum is σ = 1175863584. Its totient is φ = 159981120.

The previous prime is 491942351. The next prime is 491942443. The reversal of 491942436 is 634249194.

It is a super-2 number, since 2×491942436² = 484014720675228192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499450 + ... + 500433.

It is an arithmetic number, because the mean of its divisors is an integer number (48994316).

Almost surely, 2^491942436 is an apocalyptic number.

It is an amenable number.

491942436 is an abundant number, since it is smaller than the sum of its proper divisors (683921148).

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

491942436 is a wasteful number, since it uses less digits than its factorization.

491942436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999931 (or 999929 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 491942436 is about 22179.7753820908. The cubic root of 491942436 is about 789.4138877536.

The spelling of 491942436 in words is "four hundred ninety-one million, nine hundred forty-two thousand, four hundred thirty-six".