305333988 has 12 divisors (see below), whose sum is σ = 712446000. Its totient is φ = 101777992.

The previous prime is 305333983. The next prime is 305334017. The reversal of 305333988 is 889333503.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (305333983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12722238 + ... + 12722261.

It is an arithmetic number, because the mean of its divisors is an integer number (59370500).

Almost surely, 2^305333988 is an apocalyptic number.

It is an amenable number.

305333988 is an abundant number, since it is smaller than the sum of its proper divisors (407112012).

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

305333988 is a wasteful number, since it uses less digits than its factorization.

305333988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25444506 (or 25444504 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 305333988 is about 17473.8086289166. The cubic root of 305333988 is about 673.3771626754.

The spelling of 305333988 in words is "three hundred five million, three hundred thirty-three thousand, nine hundred eighty-eight".