30687986 has 16 divisors (see below), whose sum is σ = 52767936. Its totient is φ = 13112016.

The previous prime is 30687977. The next prime is 30687997. The reversal of 30687986 is 68978603.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30687986.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700 + ... + 8016.

It is an arithmetic number, because the mean of its divisors is an integer number (3297996).

Almost surely, 2^30687986 is an apocalyptic number.

30687986 is a deficient number, since it is larger than the sum of its proper divisors (22079950).

30687986 is a wasteful number, since it uses less digits than its factorization.

30687986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 30687986 is about 5539.6738171123. The cubic root of 30687986 is about 313.0805795795.

The spelling of 30687986 in words is "thirty million, six hundred eighty-seven thousand, nine hundred eighty-six".