74043891 has 24 divisors (see below), whose sum is σ = 113976720. Its totient is φ = 46158336.

The previous prime is 74043889. The next prime is 74043913. The reversal of 74043891 is 19834047.

It is a happy number.

It is not a de Polignac number, because 74043891 - 2¹ = 74043889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74043811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23455 + ... + 26423.

It is an arithmetic number, because the mean of its divisors is an integer number (4749030).

Almost surely, 2^74043891 is an apocalyptic number.

74043891 is a deficient number, since it is larger than the sum of its proper divisors (39932829).

74043891 is a wasteful number, since it uses less digits than its factorization.

74043891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 74043891 is about 8604.8760014308. The cubic root of 74043891 is about 419.9166331132.

The spelling of 74043891 in words is "seventy-four million, forty-three thousand, eight hundred ninety-one".