491242248 has 72 divisors (see below), whose sum is σ = 1547674830. Its totient is φ = 140353920.

The previous prime is 491242247. The next prime is 491242249. The reversal of 491242248 is 842242194.

It is an interprime number because it is at equal distance from previous prime (491242247) and next prime (491242249).

It can be written as a sum of positive squares in only one way, i.e., 297976644 + 193265604 = 17262^2 + 13902^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (491242247) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 66093 + ... + 73148.

Almost surely, 2^491242248 is an apocalyptic number.

It is an amenable number.

491242248 is an abundant number, since it is smaller than the sum of its proper divisors (1056432582).

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

491242248 is a wasteful number, since it uses less digits than its factorization.

491242248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139267 (or 139253 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 491242248 is about 22163.9853816952. The cubic root of 491242248 is about 789.0391822744.

The spelling of 491242248 in words is "four hundred ninety-one million, two hundred forty-two thousand, two hundred forty-eight".