31349228 has 12 divisors (see below), whose sum is σ = 54920712. Its totient is φ = 15657600.

The previous prime is 31349191. The next prime is 31349231. The reversal of 31349228 is 82294313.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31349194 and 31349203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (4576726).

Almost surely, 2^31349228 is an apocalyptic number.

It is an amenable number.

31349228 is a deficient number, since it is larger than the sum of its proper divisors (23571484).

31349228 is a wasteful number, since it uses less digits than its factorization.

31349228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512 (or 8510 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 31349228 is about 5599.0381316794. The cubic root of 31349228 is about 315.3132954185.

The spelling of 31349228 in words is "thirty-one million, three hundred forty-nine thousand, two hundred twenty-eight".