306220988 has 24 divisors (see below), whose sum is σ = 560407680. Its totient is φ = 146133680.

The previous prime is 306220987. The next prime is 306221023. The reversal of 306220988 is 889022603.

It is a happy number.

It is a super-2 number, since 2×306220988² = 187542586983392288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306220987) 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 7 ways as a sum of consecutive naturals, for example, 41783 + ... + 48561.

It is an arithmetic number, because the mean of its divisors is an integer number (23350320).

Almost surely, 2^306220988 is an apocalyptic number.

It is an amenable number.

306220988 is a deficient number, since it is larger than the sum of its proper divisors (254186692).

306220988 is a wasteful number, since it uses less digits than its factorization.

306220988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297 (or 7295 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 306220988 is about 17499.1710660820. The cubic root of 306220988 is about 674.0285893358.

The spelling of 306220988 in words is "three hundred six million, two hundred twenty thousand, nine hundred eighty-eight".