84400320 has 56 divisors (see below), whose sum is σ = 267974064. Its totient is φ = 22506496.

The previous prime is 84400319. The next prime is 84400331. The reversal of 84400320 is 2300448.

It is a happy number.

It is a super-2 number, since 2×84400320² = 14246828032204800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42999 + ... + 44918.

Almost surely, 2^84400320 is an apocalyptic number.

84400320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84400320 is an abundant number, since it is smaller than the sum of its proper divisors (183573744).

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

84400320 is a wasteful number, since it uses less digits than its factorization.

84400320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87937 (or 87927 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 84400320 is about 9186.9646782819. The cubic root of 84400320 is about 438.6465296057.

Adding to 84400320 its reverse (2300448), we get a palindrome (86700768).

The spelling of 84400320 in words is "eighty-four million, four hundred thousand, three hundred twenty".