7445438891 has 8 divisors (see below), whose sum is σ = 8125325568. Its totient is φ = 6766057000.

The previous prime is 7445438879. The next prime is 7445438909. The reversal of 7445438891 is 1988345447.

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

It is a cyclic number.

It is not a de Polignac number, because 7445438891 - 2¹⁴ = 7445422507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7445438191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95015 + ... + 154656.

It is an arithmetic number, because the mean of its divisors is an integer number (1015665696).

Almost surely, 2^7445438891 is an apocalyptic number.

7445438891 is a deficient number, since it is larger than the sum of its proper divisors (679886677).

7445438891 is a wasteful number, since it uses less digits than its factorization.

7445438891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252393.

The product of its digits is 3870720, while the sum is 53.

The square root of 7445438891 is about 86286.9566678533. The cubic root of 7445438891 is about 1952.6756074884.

The spelling of 7445438891 in words is "seven billion, four hundred forty-five million, four hundred thirty-eight thousand, eight hundred ninety-one".