7448891 has 4 divisors (see below), whose sum is σ = 7470000. Its totient is φ = 7427784.

The previous prime is 7448887. The next prime is 7448923. The reversal of 7448891 is 1988447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1988447 = 73 ⋅27239.

It is a cyclic number.

It is not a de Polignac number, because 7448891 - 2² = 7448887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7448821) 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 3 ways as a sum of consecutive naturals, for example, 10016 + ... + 10733.

It is an arithmetic number, because the mean of its divisors is an integer number (1867500).

Almost surely, 2^7448891 is an apocalyptic number.

7448891 is a deficient number, since it is larger than the sum of its proper divisors (21109).

7448891 is a wasteful number, since it uses less digits than its factorization.

7448891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108.

The product of its digits is 64512, while the sum is 41.

The square root of 7448891 is about 2729.2656521489. The cubic root of 7448891 is about 195.2977349606.

The spelling of 7448891 in words is "seven million, four hundred forty-eight thousand, eight hundred ninety-one".