4018491 has 24 divisors (see below), whose sum is σ = 6289920. Its totient is φ = 2558952.

The previous prime is 4018489. The next prime is 4018507. The reversal of 4018491 is 1948104.

It is not a de Polignac number, because 4018491 - 2¹ = 4018489 is a prime.

It is a super-2 number, since 2×4018491² = 32296539834162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018471) 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 23 ways as a sum of consecutive naturals, for example, 5230 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (262080).

Almost surely, 2^4018491 is an apocalyptic number.

4018491 is a deficient number, since it is larger than the sum of its proper divisors (2271429).

4018491 is an equidigital number, since it uses as much as digits as its factorization.

4018491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 4018491 is about 2004.6174198585. The cubic root of 4018491 is about 158.9843345193.

The spelling of 4018491 in words is "four million, eighteen thousand, four hundred ninety-one".