31743228 has 24 divisors (see below), whose sum is σ = 80801280. Its totient is φ = 9619120.

The previous prime is 31743223. The next prime is 31743253. The reversal of 31743228 is 82234713.

It is a junction number, because it is equal to n+sod(n) for n = 31743195 and 31743204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31743223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120108 + ... + 120371.

It is an arithmetic number, because the mean of its divisors is an integer number (3366720).

Almost surely, 2^31743228 is an apocalyptic number.

It is an amenable number.

31743228 is an abundant number, since it is smaller than the sum of its proper divisors (49058052).

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

31743228 is a wasteful number, since it uses less digits than its factorization.

31743228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240497 (or 240495 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 31743228 is about 5634.1128849181. The cubic root of 31743228 is about 316.6287619758.

The spelling of 31743228 in words is "thirty-one million, seven hundred forty-three thousand, two hundred twenty-eight".