8308404 has 72 divisors (see below), whose sum is σ = 23222472. Its totient is φ = 2488320.

The previous prime is 8308373. The next prime is 8308409. The reversal of 8308404 is 4048038.

It can be written as a sum of positive squares in 4 ways, for example, as 756900 + 7551504 = 870^2 + 2748^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8308409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18972 + ... + 19404.

Almost surely, 2^8308404 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 8308404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11611236).

8308404 is an abundant number, since it is smaller than the sum of its proper divisors (14914068).

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

8308404 is a wasteful number, since it uses less digits than its factorization.

8308404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 8308404 is about 2882.4302246542. The cubic root of 8308404 is about 202.5376975999.

The spelling of 8308404 in words is "eight million, three hundred eight thousand, four hundred four".