30687648 has 48 divisors (see below), whose sum is σ = 80904096. Its totient is φ = 10184960.

The previous prime is 30687637. The next prime is 30687649. The reversal of 30687648 is 84678603.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (30687649) 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, 27583 + ... + 28673.

It is an arithmetic number, because the mean of its divisors is an integer number (1685502).

Almost surely, 2^30687648 is an apocalyptic number.

It is an amenable number.

30687648 is an abundant number, since it is smaller than the sum of its proper divisors (50216448).

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

30687648 is a wasteful number, since it uses less digits than its factorization.

30687648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 30687648 is about 5539.6433098170. The cubic root of 30687648 is about 313.0794301436.

The spelling of 30687648 in words is "thirty million, six hundred eighty-seven thousand, six hundred forty-eight".