30967988 has 6 divisors (see below), whose sum is σ = 54193986. Its totient is φ = 15483992.

The previous prime is 30967973. The next prime is 30967991. The reversal of 30967988 is 88976903.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 3489424 = 5242^2 + 1868^2 .

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 as a sum of consecutive naturals, namely, 3870995 + ... + 3871002.

It is an arithmetic number, because the mean of its divisors is an integer number (9032331).

Almost surely, 2^30967988 is an apocalyptic number.

It is an amenable number.

30967988 is a deficient number, since it is larger than the sum of its proper divisors (23225998).

30967988 is a wasteful number, since it uses less digits than its factorization.

30967988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742001 (or 7741999 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 30967988 is about 5564.8888578300. Note that the first 4 decimals coincide. The cubic root of 30967988 is about 314.0298969464.

The spelling of 30967988 in words is "thirty million, nine hundred sixty-seven thousand, nine hundred eighty-eight".