308904 has 32 divisors (see below), whose sum is σ = 788640. Its totient is φ = 100800.

The previous prime is 308899. The next prime is 308923. The reversal of 308904 is 409803.

308904 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

308904 is an undulating number in base 14.

It is a congruent number.

It is an unprimeable number.

308904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (24645).

2³⁰⁸⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394320).

308904 is an abundant number, since it is smaller than the sum of its proper divisors (479736).

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

308904 is a wasteful number, since it uses less digits than its factorization.

308904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 308904 is about 555.7913277481. The cubic root of 308904 is about 67.5991410089.

The spelling of 308904 in words is "three hundred eight thousand, nine hundred four".