31679770 has 16 divisors (see below), whose sum is σ = 58565448. Its totient is φ = 12329280.

The previous prime is 31679749. The next prime is 31679779. The reversal of 31679770 is 7797613.

It can be written as a sum of positive squares in 4 ways, for example, as 31663129 + 16641 = 5627^2 + 129^2 .

It is not an unprimeable number, because it can be changed into a prime (31679779) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42441 + ... + 43180.

Almost surely, 2^31679770 is an apocalyptic number.

31679770 is a deficient number, since it is larger than the sum of its proper divisors (26885678).

31679770 is a wasteful number, since it uses less digits than its factorization.

31679770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85665.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 31679770 is about 5628.4784800157. The cubic root of 31679770 is about 316.4176299936.

The spelling of 31679770 in words is "thirty-one million, six hundred seventy-nine thousand, seven hundred seventy".