4991268 has 48 divisors (see below), whose sum is σ = 12640320. Its totient is φ = 1526784.

The previous prime is 4991267. The next prime is 4991291. The reversal of 4991268 is 8621994.

It is not an unprimeable number, because it can be changed into a prime (4991267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8488 + ... + 9056.

It is an arithmetic number, because the mean of its divisors is an integer number (263340).

Almost surely, 2^4991268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4991268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6320160).

4991268 is an abundant number, since it is smaller than the sum of its proper divisors (7649052).

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

4991268 is a wasteful number, since it uses less digits than its factorization.

4991268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 634 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 4991268 is about 2234.1145897201. The cubic root of 4991268 is about 170.8979932641.

The spelling of 4991268 in words is "four million, nine hundred ninety-one thousand, two hundred sixty-eight".