31028671 has 4 divisors (see below), whose sum is σ = 31750312. Its totient is φ = 30307032.

The previous prime is 31028663. The next prime is 31028707. The reversal of 31028671 is 17682013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31028671 - 2³ = 31028663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31028611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360756 + ... + 360841.

It is an arithmetic number, because the mean of its divisors is an integer number (7937578).

Almost surely, 2^31028671 is an apocalyptic number.

31028671 is a deficient number, since it is larger than the sum of its proper divisors (721641).

31028671 is an equidigital number, since it uses as much as digits as its factorization.

31028671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721640.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 31028671 is about 5570.3384995887. The cubic root of 31028671 is about 314.2348811233.

The spelling of 31028671 in words is "thirty-one million, twenty-eight thousand, six hundred seventy-one".