78104400 has 240 divisors, whose sum is σ = 280273728. Its totient is φ = 18432000.

The previous prime is 78104371. The next prime is 78104401. The reversal of 78104400 is 440187.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×78104400² = 12200594598720000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78104401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 805152 + ... + 805248.

Almost surely, 2^78104400 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 78104400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140136864).

78104400 is an abundant number, since it is smaller than the sum of its proper divisors (202169328).

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

78104400 is a wasteful number, since it uses less digits than its factorization.

78104400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 78104400 is about 8837.6693760290. The cubic root of 78104400 is about 427.4564094947.

Adding to 78104400 its reverse (440187), we get a palindrome (78544587).

The spelling of 78104400 in words is "seventy-eight million, one hundred four thousand, four hundred".