31029228 has 36 divisors (see below), whose sum is σ = 78711360. Its totient is φ = 10306656.

The previous prime is 31029209. The next prime is 31029247. The reversal of 31029228 is 82292013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31029209) and next prime (31029247).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10053 + ... + 12771.

Almost surely, 2^31029228 is an apocalyptic number.

It is an amenable number.

31029228 is an abundant number, since it is smaller than the sum of its proper divisors (47682132).

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

31029228 is a wasteful number, since it uses less digits than its factorization.

31029228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3041 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 31029228 is about 5570.3884963259. The cubic root of 31029228 is about 314.2367614035.

The spelling of 31029228 in words is "thirty-one million, twenty-nine thousand, two hundred twenty-eight".