306988 has 12 divisors (see below), whose sum is σ = 586152. Its totient is φ = 139520.

The previous prime is 306953. The next prime is 306991. The reversal of 306988 is 889603.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445 + ... + 3532.

It is an arithmetic number, because the mean of its divisors is an integer number (48846).

2³⁰⁶⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

306988 is a deficient number, since it is larger than the sum of its proper divisors (279164).

306988 is a wasteful number, since it uses less digits than its factorization.

306988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 306988 is about 554.0649781388. The cubic root of 306988 is about 67.4590881484.

It can be divided in two parts, 3069 and 88, that multiplied together give a palindrome (270072).

The spelling of 306988 in words is "three hundred six thousand, nine hundred eighty-eight".