74274228 has 72 divisors (see below), whose sum is σ = 215429760. Its totient is φ = 21136320.

The previous prime is 74274223. The next prime is 74274229. The reversal of 74274228 is 82247247.

74274228 is a `hidden beast` number, since 7 + 427 + 4 + 228 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74274192 and 74274201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74274223) 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, 90058 + ... + 90878.

It is an arithmetic number, because the mean of its divisors is an integer number (2992080).

Almost surely, 2^74274228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74274228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107714880).

74274228 is an abundant number, since it is smaller than the sum of its proper divisors (141155532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74274228 is a wasteful number, since it uses less digits than its factorization.

74274228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1192 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 74274228 is about 8618.2497062919. The cubic root of 74274228 is about 420.3516103231.

The spelling of 74274228 in words is "seventy-four million, two hundred seventy-four thousand, two hundred twenty-eight".