491436288 has 216 divisors, whose sum is σ = 1691696160. Its totient is φ = 140313600.

The previous prime is 491436269. The next prime is 491436317. The reversal of 491436288 is 882634194.

It is a happy number.

491436288 is a `hidden beast` number, since 4 + 9 + 14 + 3 + 628 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337963 + ... + 339413.

Almost surely, 2^491436288 is an apocalyptic number.

491436288 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491436288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845848080).

491436288 is an abundant number, since it is smaller than the sum of its proper divisors (1200259872).

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

491436288 is a wasteful number, since it uses less digits than its factorization.

491436288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1463 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 491436288 is about 22168.3623211098. The cubic root of 491436288 is about 789.1430583893.

The spelling of 491436288 in words is "four hundred ninety-one million, four hundred thirty-six thousand, two hundred eighty-eight".