308404 has 6 divisors (see below), whose sum is σ = 539714. Its totient is φ = 154200.

The previous prime is 308383. The next prime is 308411. The reversal of 308404 is 404803.

308404 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in only one way, i.e., 300304 + 8100 = 548^2 + 90^2 .

It is a super-2 number, since 2×308404² = 190226054432, which contains 22 as substring.

308404 is an undulating number in base 16.

It is a congruent number.

It is an unprimeable number.

308404 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 as a sum of consecutive naturals, namely, 38547 + ... + 38554.

2³⁰⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

308404 is a deficient number, since it is larger than the sum of its proper divisors (231310).

308404 is a wasteful number, since it uses less digits than its factorization.

308404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77105 (or 77103 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 308404 is about 555.3413364769. The cubic root of 308404 is about 67.5626487403.

The spelling of 308404 in words is "three hundred eight thousand, four hundred four".