308009408 has 28 divisors (see below), whose sum is σ = 698522352. Its totient is φ = 132003840.

The previous prime is 308009407. The next prime is 308009413. The reversal of 308009408 is 804900803.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308009407) 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, 343313 + ... + 344208.

Almost surely, 2^308009408 is an apocalyptic number.

It is an amenable number.

308009408 is an abundant number, since it is smaller than the sum of its proper divisors (390512944).

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

308009408 is an equidigital number, since it uses as much as digits as its factorization.

308009408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687540 (or 687530 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 308009408 is about 17550.1968080133. The cubic root of 308009408 is about 675.3382177003.

The spelling of 308009408 in words is "three hundred eight million, nine thousand, four hundred eight".