74211228 has 144 divisors (see below), whose sum is σ = 239715840. Its totient is φ = 19548864.

The previous prime is 74211227. The next prime is 74211253. The reversal of 74211228 is 82211247.

It is a super-2 number, since 2×74211228² = 11014612722535968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74211223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88033 + ... + 88871.

Almost surely, 2^74211228 is an apocalyptic number.

74211228 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74211228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119857920).

74211228 is an abundant number, since it is smaller than the sum of its proper divisors (165504612).

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

74211228 is a wasteful number, since it uses less digits than its factorization.

74211228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 864 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 74211228 is about 8614.5938964063. The cubic root of 74211228 is about 420.2327281610.

It can be divided in two parts, 7421 and 1228, that added together give a square (8649 = 93²).

The spelling of 74211228 in words is "seventy-four million, two hundred eleven thousand, two hundred twenty-eight".