4991490 has 128 divisors (see below), whose sum is σ = 16128000. Its totient is φ = 1073088.

The previous prime is 4991479. The next prime is 4991491. The reversal of 4991490 is 941994.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4991491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35841 + ... + 35979.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

Almost surely, 2^4991490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4991490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8064000).

4991490 is an abundant number, since it is smaller than the sum of its proper divisors (11136510).

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

4991490 is a wasteful number, since it uses less digits than its factorization.

4991490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 4991490 is about 2234.1642732798. The cubic root of 4991490 is about 170.9005269417.

The spelling of 4991490 in words is "four million, nine hundred ninety-one thousand, four hundred ninety".