308649 has 16 divisors (see below), whose sum is σ = 460800. Its totient is φ = 182160.

The previous prime is 308641. The next prime is 308663. The reversal of 308649 is 946803.

It is not a de Polignac number, because 308649 - 2³ = 308641 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (308641) 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, 1452 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (28800).

2³⁰⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

308649 is a deficient number, since it is larger than the sum of its proper divisors (152151).

308649 is a wasteful number, since it uses less digits than its factorization.

308649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 308649 is about 555.5618777418. The cubic root of 308649 is about 67.5805348762.

The spelling of 308649 in words is "three hundred eight thousand, six hundred forty-nine".