74771228 has 24 divisors (see below), whose sum is σ = 153586272. Its totient is φ = 31178304.

The previous prime is 74771171. The next prime is 74771233. The reversal of 74771228 is 82217747.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 74771191 and 74771200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35051 + ... + 37122.

It is an arithmetic number, because the mean of its divisors is an integer number (6399428).

Almost surely, 2^74771228 is an apocalyptic number.

It is an amenable number.

74771228 is an abundant number, since it is smaller than the sum of its proper divisors (78815044).

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

74771228 is a wasteful number, since it uses less digits than its factorization.

74771228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72221 (or 72219 counting only the distinct ones).

The product of its digits is 43904, while the sum is 38.

The square root of 74771228 is about 8647.0357926864. The cubic root of 74771228 is about 421.2871097633.

The spelling of 74771228 in words is "seventy-four million, seven hundred seventy-one thousand, two hundred twenty-eight".