31677668 has 12 divisors (see below), whose sum is σ = 60475632. Its totient is φ = 14398920.

The previous prime is 31677649. The next prime is 31677673. The reversal of 31677668 is 86677613.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 719947 = 31677668 / (3 + 1 + 6 + 7 + 7 + 6 + 6 + 8).

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, 359930 + ... + 360017.

It is an arithmetic number, because the mean of its divisors is an integer number (5039636).

Almost surely, 2^31677668 is an apocalyptic number.

It is an amenable number.

31677668 is a deficient number, since it is larger than the sum of its proper divisors (28797964).

31677668 is a wasteful number, since it uses less digits than its factorization.

31677668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719962 (or 719960 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 31677668 is about 5628.2917479463. The cubic root of 31677668 is about 316.4106315782.

Subtracting 31677668 from its reverse (86677613), we obtain a palindrome (54999945).

The spelling of 31677668 in words is "thirty-one million, six hundred seventy-seven thousand, six hundred sixty-eight".