30688130 has 32 divisors (see below), whose sum is σ = 60575040. Its totient is φ = 11101120.

The previous prime is 30688123. The next prime is 30688139. The reversal of 30688130 is 3188603.

It is a super-2 number, since 2×30688130² = 1883522645793800, 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 = 30688093 and 30688102.

It is not an unprimeable number, because it can be changed into a prime (30688139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24356 + ... + 25584.

It is an arithmetic number, because the mean of its divisors is an integer number (1892970).

Almost surely, 2^30688130 is an apocalyptic number.

30688130 is a deficient number, since it is larger than the sum of its proper divisors (29886910).

30688130 is a wasteful number, since it uses less digits than its factorization.

30688130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30688130 is about 5539.6868142522. The cubic root of 30688130 is about 313.0810692775.

The spelling of 30688130 in words is "thirty million, six hundred eighty-eight thousand, one hundred thirty".