788099920 has 20 divisors (see below), whose sum is σ = 1832332500. Its totient is φ = 315239936.

The previous prime is 788099891. The next prime is 788099927. The reversal of 788099920 is 29990887.

It can be written as a sum of positive squares in 2 ways, for example, as 269353744 + 518746176 = 16412^2 + 22776^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×788099920² = 1242202967808012800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788099927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4925545 + ... + 4925704.

It is an arithmetic number, because the mean of its divisors is an integer number (91616625).

Almost surely, 2^788099920 is an apocalyptic number.

It is an amenable number.

788099920 is an abundant number, since it is smaller than the sum of its proper divisors (1044232580).

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

788099920 is a wasteful number, since it uses less digits than its factorization.

788099920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9851262 (or 9851256 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 788099920 is about 28073.1173901297. The cubic root of 788099920 is about 923.6918132888.

The spelling of 788099920 in words is "seven hundred eighty-eight million, ninety-nine thousand, nine hundred twenty".