30699988 has 12 divisors (see below), whose sum is σ = 58609152. Its totient is φ = 13954520.

The previous prime is 30699971. The next prime is 30699989. The reversal of 30699988 is 88999603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30699989) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 348820 + ... + 348907.

It is an arithmetic number, because the mean of its divisors is an integer number (4884096).

Almost surely, 2^30699988 is an apocalyptic number.

It is an amenable number.

30699988 is a deficient number, since it is larger than the sum of its proper divisors (27909164).

30699988 is a wasteful number, since it uses less digits than its factorization.

30699988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697742 (or 697740 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 30699988 is about 5540.7569879936. The cubic root of 30699988 is about 313.1213892888.

The spelling of 30699988 in words is "thirty million, six hundred ninety-nine thousand, nine hundred eighty-eight".