308387 has 4 divisors (see below), whose sum is σ = 310776. Its totient is φ = 306000.

The previous prime is 308383. The next prime is 308411. The reversal of 308387 is 783803.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 308387 - 2² = 308383 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308387.

It is not an unprimeable number, because it can be changed into a prime (308383) 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, 989 + ... + 1262.

It is an arithmetic number, because the mean of its divisors is an integer number (77694).

2³⁰⁸³⁸⁷ is an apocalyptic number.

308387 is a deficient number, since it is larger than the sum of its proper divisors (2389).

308387 is a wasteful number, since it uses less digits than its factorization.

308387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 308387 is about 555.3260303641. The cubic root of 308387 is about 67.5614073101.

The spelling of 308387 in words is "three hundred eight thousand, three hundred eighty-seven".