8404400 has 30 divisors (see below), whose sum is σ = 20192532. Its totient is φ = 3361600.

The previous prime is 8404387. The next prime is 8404411. The reversal of 8404400 is 44048.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10106 + ... + 10905.

Almost surely, 2^8404400 is an apocalyptic number.

8404400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8404400 is an abundant number, since it is smaller than the sum of its proper divisors (11788132).

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

8404400 is a wasteful number, since it uses less digits than its factorization.

8404400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21029 (or 21018 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 8404400 is about 2899.0343219769. The cubic root of 8404400 is about 203.3147583737.

Adding to 8404400 its reverse (44048), we get a palindrome (8448448).

The spelling of 8404400 in words is "eight million, four hundred four thousand, four hundred".