308428 has 12 divisors (see below), whose sum is σ = 546840. Its totient is φ = 152192.

The previous prime is 308423. The next prime is 308437. The reversal of 308428 is 824803.

308428 is nontrivially palindromic in base 3.

It is not an unprimeable number, because it can be changed into a prime (308423) 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, 133 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (45570).

2³⁰⁸⁴²⁸ is an apocalyptic number.

It is an amenable number.

308428 is a deficient number, since it is larger than the sum of its proper divisors (238412).

308428 is a wasteful number, since it uses less digits than its factorization.

308428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 308428 is about 555.3629443886. The cubic root of 308428 is about 67.5644012700.

The spelling of 308428 in words is "three hundred eight thousand, four hundred twenty-eight".