30688534 has 16 divisors (see below), whose sum is σ = 48844800. Its totient is φ = 14419944.

The previous prime is 30688523. The next prime is 30688549. The reversal of 30688534 is 43588603.

It is a super-2 number, since 2×30688534² = 1883572238138312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30688493 and 30688502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (3052800).

Almost surely, 2^30688534 is an apocalyptic number.

30688534 is a deficient number, since it is larger than the sum of its proper divisors (18156266).

30688534 is a wasteful number, since it uses less digits than its factorization.

30688534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 30688534 is about 5539.7232782875. The cubic root of 30688534 is about 313.0824431442.

The spelling of 30688534 in words is "thirty million, six hundred eighty-eight thousand, five hundred thirty-four".