30640068 has 18 divisors (see below), whose sum is σ = 77451374. Its totient is φ = 10213344.

The previous prime is 30640019. The next prime is 30640087. The reversal of 30640068 is 86004603.

It can be written as a sum of positive squares in only one way, i.e., 25220484 + 5419584 = 5022^2 + 2328^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425521 + ... + 425592.

Almost surely, 2^30640068 is an apocalyptic number.

It is an amenable number.

30640068 is an abundant number, since it is smaller than the sum of its proper divisors (46811306).

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

30640068 is a wasteful number, since it uses less digits than its factorization.

30640068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851123 (or 851118 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 30640068 is about 5535.3471435855. The cubic root of 30640068 is about 312.9175406363.

The spelling of 30640068 in words is "thirty million, six hundred forty thousand, sixty-eight".