30688340 has 24 divisors (see below), whose sum is σ = 65264640. Its totient is φ = 12119328.

The previous prime is 30688331. The next prime is 30688367. The reversal of 30688340 is 4388603.

It is a junction number, because it is equal to n+sod(n) for n = 30688297 and 30688306.

It is a congruent number.

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, 8132 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (2719360).

Almost surely, 2^30688340 is an apocalyptic number.

It is an amenable number.

30688340 is an abundant number, since it is smaller than the sum of its proper divisors (34576300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30688340 is a wasteful number, since it uses less digits than its factorization.

30688340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19511 (or 19509 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 30688340 is about 5539.7057683599. The cubic root of 30688340 is about 313.0817834176.

The spelling of 30688340 in words is "thirty million, six hundred eighty-eight thousand, three hundred forty".