308406 has 24 divisors (see below), whose sum is σ = 718200. Its totient is φ = 88032.

The previous prime is 308383. The next prime is 308411. The reversal of 308406 is 604803.

It is a super-2 number, since 2×308406² = 190228521672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308406.

It is an unprimeable number.

308406 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 11 ways as a sum of consecutive naturals, for example, 231 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (29925).

2³⁰⁸⁴⁰⁶ is an apocalyptic number.

308406 is an abundant number, since it is smaller than the sum of its proper divisors (409794).

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

308406 is a wasteful number, since it uses less digits than its factorization.

308406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 308406 is about 555.3431371684. The cubic root of 308406 is about 67.5627947879.

The spelling of 308406 in words is "three hundred eight thousand, four hundred six".