9878772 has 12 divisors (see below), whose sum is σ = 23050496. Its totient is φ = 3292920.

The previous prime is 9878749. The next prime is 9878773. The reversal of 9878772 is 2778789.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411604 + ... + 411627.

Almost surely, 2^9878772 is an apocalyptic number.

It is an amenable number.

9878772 is an abundant number, since it is smaller than the sum of its proper divisors (13171724).

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

9878772 is a wasteful number, since it uses less digits than its factorization.

9878772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823238 (or 823236 counting only the distinct ones).

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

The square root of 9878772 is about 3143.0513836080. The cubic root of 9878772 is about 214.5693344142.

The spelling of 9878772 in words is "nine million, eight hundred seventy-eight thousand, seven hundred seventy-two".