74228239 has 4 divisors (see below), whose sum is σ = 78594624. Its totient is φ = 69861856.

The previous prime is 74228207. The next prime is 74228243. The reversal of 74228239 is 93282247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74228239 - 2⁵ = 74228207 is a prime.

It is a super-2 number, since 2×74228239² = 11019662930082242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74228198 and 74228207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74228279) 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, 2183167 + ... + 2183200.

It is an arithmetic number, because the mean of its divisors is an integer number (19648656).

Almost surely, 2^74228239 is an apocalyptic number.

74228239 is a deficient number, since it is larger than the sum of its proper divisors (4366385).

74228239 is a wasteful number, since it uses less digits than its factorization.

74228239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366384.

The product of its digits is 48384, while the sum is 37.

The square root of 74228239 is about 8615.5811759858. The cubic root of 74228239 is about 420.2648348605.

The spelling of 74228239 in words is "seventy-four million, two hundred twenty-eight thousand, two hundred thirty-nine".