308513868 has 48 divisors (see below), whose sum is σ = 816049920. Its totient is φ = 89930304.

The previous prime is 308513837. The next prime is 308513869. The reversal of 308513868 is 868315803.

It is not an unprimeable number, because it can be changed into a prime (308513869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49080 + ... + 55007.

It is an arithmetic number, because the mean of its divisors is an integer number (17001040).

Almost surely, 2^308513868 is an apocalyptic number.

308513868 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

308513868 is an abundant number, since it is smaller than the sum of its proper divisors (507536052).

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

308513868 is a wasteful number, since it uses less digits than its factorization.

308513868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104126 (or 104124 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 308513868 is about 17564.5628468231. The cubic root of 308513868 is about 675.7067078476.

The spelling of 308513868 in words is "three hundred eight million, five hundred thirteen thousand, eight hundred sixty-eight".