78800000 has 96 divisors (see below), whose sum is σ = 197213940. Its totient is φ = 31360000.

The previous prime is 78799997. The next prime is 78800017. The reversal of 78800000 is 887.

It can be written as a sum of positive squares in 6 ways, for example, as 87616 + 78712384 = 296^2 + 8872^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399902 + ... + 400098.

Almost surely, 2^78800000 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 78800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98606970).

78800000 is an abundant number, since it is smaller than the sum of its proper divisors (118413940).

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

78800000 is an frugal number, since it uses more digits than its factorization.

78800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 78800000 is about 8876.9364084689. The cubic root of 78800000 is about 428.7216404671.

Adding to 78800000 its reverse (887), we get a palindrome (78800887).

The spelling of 78800000 in words is "seventy-eight million, eight hundred thousand".