31406828 has 6 divisors (see below), whose sum is σ = 54961956. Its totient is φ = 15703412.

The previous prime is 31406807. The next prime is 31406831. The reversal of 31406828 is 82860413.

It is a junction number, because it is equal to n+sod(n) for n = 31406794 and 31406803.

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 as a sum of consecutive naturals, namely, 3925850 + ... + 3925857.

It is an arithmetic number, because the mean of its divisors is an integer number (9160326).

Almost surely, 2^31406828 is an apocalyptic number.

It is an amenable number.

31406828 is a deficient number, since it is larger than the sum of its proper divisors (23555128).

31406828 is a wasteful number, since it uses less digits than its factorization.

31406828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851711 (or 7851709 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 31406828 is about 5604.1795117573. The cubic root of 31406828 is about 315.5062925551.

The spelling of 31406828 in words is "thirty-one million, four hundred six thousand, eight hundred twenty-eight".