9778997488 has 20 divisors (see below), whose sum is σ = 20404254808. Its totient is φ = 4513383360.

The previous prime is 9778997477. The next prime is 9778997497. The reversal of 9778997488 is 8847998779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23506998 + ... + 23507413.

Almost surely, 2^9778997488 is an apocalyptic number.

It is an amenable number.

9778997488 is an abundant number, since it is smaller than the sum of its proper divisors (10625257320).

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

9778997488 is a wasteful number, since it uses less digits than its factorization.

9778997488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47014432 (or 47014426 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 76.

The square root of 9778997488 is about 98888.8137657642. The cubic root of 9778997488 is about 2138.4451313551.

The spelling of 9778997488 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, four hundred eighty-eight".