74228109 has 4 divisors (see below), whose sum is σ = 98970816. Its totient is φ = 49485404.

The previous prime is 74228101. The next prime is 74228111. The reversal of 74228109 is 90182247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74228109 - 2³ = 74228101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74228109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74228101) 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, 12371349 + ... + 12371354.

It is an arithmetic number, because the mean of its divisors is an integer number (24742704).

Almost surely, 2^74228109 is an apocalyptic number.

It is an amenable number.

74228109 is a deficient number, since it is larger than the sum of its proper divisors (24742707).

74228109 is a wasteful number, since it uses less digits than its factorization.

74228109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24742706.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 74228109 is about 8615.5736315117. The cubic root of 74228109 is about 420.2645895160.

The spelling of 74228109 in words is "seventy-four million, two hundred twenty-eight thousand, one hundred nine".