30688946 has 16 divisors (see below), whose sum is σ = 49586688. Its totient is φ = 14203200.

The previous prime is 30688937. The next prime is 30688949. The reversal of 30688946 is 64988603.

It is a super-2 number, since 2×30688946² = 1883622813181832, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30688897 and 30688906.

It is not an unprimeable number, because it can be changed into a prime (30688949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9335 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (3099168).

Almost surely, 2^30688946 is an apocalyptic number.

30688946 is a deficient number, since it is larger than the sum of its proper divisors (18897742).

30688946 is a wasteful number, since it uses less digits than its factorization.

30688946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21577.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 30688946 is about 5539.7604641356. The cubic root of 30688946 is about 313.0838442037.

The spelling of 30688946 in words is "thirty million, six hundred eighty-eight thousand, nine hundred forty-six".