30686990 has 8 divisors (see below), whose sum is σ = 55236600. Its totient is φ = 12274792.

The previous prime is 30686987. The next prime is 30687001. The reversal of 30686990 is 9968603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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, 1534340 + ... + 1534359.

It is an arithmetic number, because the mean of its divisors is an integer number (6904575).

Almost surely, 2^30686990 is an apocalyptic number.

30686990 is a deficient number, since it is larger than the sum of its proper divisors (24549610).

30686990 is a wasteful number, since it uses less digits than its factorization.

30686990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068706.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 30686990 is about 5539.5839193932. The cubic root of 30686990 is about 313.0771924600.

The spelling of 30686990 in words is "thirty million, six hundred eighty-six thousand, nine hundred ninety".