7978918288 has 40 divisors (see below), whose sum is σ = 16874518176. Its totient is φ = 3624633600.

The previous prime is 7978918267. The next prime is 7978918289. The reversal of 7978918288 is 8828198797.

It is not an unprimeable number, because it can be changed into a prime (7978918289) 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, 306220 + ... + 331252.

Almost surely, 2^7978918288 is an apocalyptic number.

It is an amenable number.

7978918288 is an abundant number, since it is smaller than the sum of its proper divisors (8895599888).

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

7978918288 is a wasteful number, since it uses less digits than its factorization.

7978918288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26863 (or 26857 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 67.

The square root of 7978918288 is about 89324.7910045134. The cubic root of 7978918288 is about 1998.2416452139.

The spelling of 7978918288 in words is "seven billion, nine hundred seventy-eight million, nine hundred eighteen thousand, two hundred eighty-eight".