78304800 has 288 divisors, whose sum is σ = 299980800. Its totient is φ = 17372160.

The previous prime is 78304799. The next prime is 78304813. The reversal of 78304800 is 840387.

It is a Cunningham number, because it is equal to 8849²-1.

It is a super-2 number, since 2×78304800² = 12263283406080000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 991161 + ... + 991239.

It is an arithmetic number, because the mean of its divisors is an integer number (1041600).

Almost surely, 2^78304800 is an apocalyptic number.

78304800 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78304800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149990400).

78304800 is an abundant number, since it is smaller than the sum of its proper divisors (221676000).

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

78304800 is a wasteful number, since it uses less digits than its factorization.

78304800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 78304800 is about 8848.9999434964. Note that the first 4 decimals coincide. The cubic root of 78304800 is about 427.8216859910.

The spelling of 78304800 in words is "seventy-eight million, three hundred four thousand, eight hundred".