29771228 has 12 divisors (see below), whose sum is σ = 52164840. Its totient is φ = 14866992.

The previous prime is 29771201. The next prime is 29771237. The reversal of 29771228 is 82217792.

It is a junction number, because it is equal to n+sod(n) for n = 29771191 and 29771200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683 + ... + 7746.

It is an arithmetic number, because the mean of its divisors is an integer number (4347070).

Almost surely, 2^29771228 is an apocalyptic number.

It is an amenable number.

29771228 is a deficient number, since it is larger than the sum of its proper divisors (22393612).

29771228 is a wasteful number, since it uses less digits than its factorization.

29771228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9316 (or 9314 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 29771228 is about 5456.3016778767. The cubic root of 29771228 is about 309.9314034833.

Subtracting 29771228 from its reverse (82217792), we obtain a square (52446564 = 7242²).

The spelling of 29771228 in words is "twenty-nine million, seven hundred seventy-one thousand, two hundred twenty-eight".