78099088 has 40 divisors (see below), whose sum is σ = 165759480. Its totient is φ = 35481600.

The previous prime is 78099083. The next prime is 78099089. The reversal of 78099088 is 88099087.

It can be written as a sum of positive squares in 4 ways, for example, as 43665664 + 34433424 = 6608^2 + 5868^2 .

It is not an unprimeable number, because it can be changed into a prime (78099083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938 + ... + 12838.

It is an arithmetic number, because the mean of its divisors is an integer number (4143987).

Almost surely, 2^78099088 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 78099088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82879740).

78099088 is an abundant number, since it is smaller than the sum of its proper divisors (87660392).

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

78099088 is a wasteful number, since it uses less digits than its factorization.

78099088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9955 (or 9949 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 78099088 is about 8837.3688391964. The cubic root of 78099088 is about 427.4467186198.

Subtracting 78099088 from its reverse (88099087), we obtain a palindrome (9999999).

The spelling of 78099088 in words is "seventy-eight million, ninety-nine thousand, eighty-eight".