9778872 has 32 divisors (see below), whose sum is σ = 24529680. Its totient is φ = 3248640.

The previous prime is 9778843. The next prime is 9778889. The reversal of 9778872 is 2788779.

9778872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9922 + ... + 10862.

Almost surely, 2^9778872 is an apocalyptic number.

It is an amenable number.

9778872 is an abundant number, since it is smaller than the sum of its proper divisors (14750808).

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

9778872 is a wasteful number, since it uses less digits than its factorization.

9778872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1379 counting only the distinct ones).

The product of its digits is 395136, while the sum is 48.

The square root of 9778872 is about 3127.1188017087. The cubic root of 9778872 is about 213.8435984189.

The spelling of 9778872 in words is "nine million, seven hundred seventy-eight thousand, eight hundred seventy-two".