491064396 has 24 divisors (see below), whose sum is σ = 1164602544. Its totient is φ = 161004480.

The previous prime is 491064391. The next prime is 491064433. The reversal of 491064396 is 693460194.

It is a super-2 number, since 2×491064396² = 482288482037689632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491064391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334695 + ... + 336158.

It is an arithmetic number, because the mean of its divisors is an integer number (48525106).

Almost surely, 2^491064396 is an apocalyptic number.

It is an amenable number.

491064396 is an abundant number, since it is smaller than the sum of its proper divisors (673538148).

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

491064396 is a wasteful number, since it uses less digits than its factorization.

491064396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670921 (or 670919 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 491064396 is about 22159.9728339184. The cubic root of 491064396 is about 788.9439481096.

The spelling of 491064396 in words is "four hundred ninety-one million, sixty-four thousand, three hundred ninety-six".