4991458 has 8 divisors (see below), whose sum is σ = 7542252. Its totient is φ = 2477376.

The previous prime is 4991453. The next prime is 4991461. The reversal of 4991458 is 8541994.

It can be written as a sum of positive squares in 2 ways, for example, as 4941729 + 49729 = 2223^2 + 223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4991458.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8835 + ... + 9382.

Almost surely, 2^4991458 is an apocalyptic number.

4991458 is a deficient number, since it is larger than the sum of its proper divisors (2550794).

4991458 is a wasteful number, since it uses less digits than its factorization.

4991458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18356.

The product of its digits is 51840, while the sum is 40.

The square root of 4991458 is about 2234.1571117538. The cubic root of 4991458 is about 170.9001617315.

The spelling of 4991458 in words is "four million, nine hundred ninety-one thousand, four hundred fifty-eight".