31105628 has 12 divisors (see below), whose sum is σ = 54474000. Its totient is φ = 15541632.

The previous prime is 31105619. The next prime is 31105639. The reversal of 31105628 is 82650113.

It is a junction number, because it is equal to n+sod(n) for n = 31105597 and 31105606.

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, 8873 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (4539500).

Almost surely, 2^31105628 is an apocalyptic number.

It is an amenable number.

31105628 is a deficient number, since it is larger than the sum of its proper divisors (23368372).

31105628 is a wasteful number, since it uses less digits than its factorization.

31105628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5596 (or 5594 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 31105628 is about 5577.2419707235. The cubic root of 31105628 is about 314.4944540496.

The spelling of 31105628 in words is "thirty-one million, one hundred five thousand, six hundred twenty-eight".