29021228 has 18 divisors (see below), whose sum is σ = 52604916. Its totient is φ = 14008624.

The previous prime is 29021221. The next prime is 29021243. The reversal of 29021228 is 82212092.

It is a junction number, because it is equal to n+sod(n) for n = 29021197 and 29021206.

It is not an unprimeable number, because it can be changed into a prime (29021221) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 950 + ... + 7677.

Almost surely, 2^29021228 is an apocalyptic number.

It is an amenable number.

29021228 is a deficient number, since it is larger than the sum of its proper divisors (23583688).

29021228 is a wasteful number, since it uses less digits than its factorization.

29021228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8689 (or 8658 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 29021228 is about 5387.1354168983. The cubic root of 29021228 is about 307.3066288152.

The spelling of 29021228 in words is "twenty-nine million, twenty-one thousand, two hundred twenty-eight".