7778308328 has 16 divisors (see below), whose sum is σ = 16667803680. Its totient is φ = 3333560688.

The previous prime is 7778308327. The next prime is 7778308357. The reversal of 7778308328 is 8238038777.

It is a self number, because there is not a number n which added to its sum of digits gives 7778308328.

It is not an unprimeable number, because it can be changed into a prime (7778308327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69449126 + ... + 69449237.

It is an arithmetic number, because the mean of its divisors is an integer number (1041737730).

Almost surely, 2^7778308328 is an apocalyptic number.

It is an amenable number.

7778308328 is an abundant number, since it is smaller than the sum of its proper divisors (8889495352).

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

7778308328 is a wasteful number, since it uses less digits than its factorization.

7778308328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138898376 (or 138898372 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 53.

The square root of 7778308328 is about 88194.7182545531. The cubic root of 7778308328 is about 1981.3523672650.

The spelling of 7778308328 in words is "seven billion, seven hundred seventy-eight million, three hundred eight thousand, three hundred twenty-eight".