308398887 has 16 divisors (see below), whose sum is σ = 483763680. Its totient is φ = 193504896.

The previous prime is 308398879. The next prime is 308398889. The reversal of 308398887 is 788893803.

It is a happy number.

It is not a de Polignac number, because 308398887 - 2³ = 308398879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308398889) 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, 335488 + ... + 336405.

It is an arithmetic number, because the mean of its divisors is an integer number (30235230).

Almost surely, 2^308398887 is an apocalyptic number.

308398887 is a deficient number, since it is larger than the sum of its proper divisors (175364793).

308398887 is a wasteful number, since it uses less digits than its factorization.

308398887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671919 (or 671913 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 308398887 is about 17561.2894458237. The cubic root of 308398887 is about 675.6227536671.

The spelling of 308398887 in words is "three hundred eight million, three hundred ninety-eight thousand, eight hundred eighty-seven".