9978884 has 6 divisors (see below), whose sum is σ = 17463054. Its totient is φ = 4989440.

The previous prime is 9978883. The next prime is 9978887. The reversal of 9978884 is 4888799.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 846400 = 3022^2 + 920^2 .

It is a super-3 number, since 3×9978884³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (9978883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247357 + ... + 1247364.

It is an arithmetic number, because the mean of its divisors is an integer number (2910509).

Almost surely, 2^9978884 is an apocalyptic number.

It is an amenable number.

9978884 is a deficient number, since it is larger than the sum of its proper divisors (7484170).

9978884 is a wasteful number, since it uses less digits than its factorization.

9978884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494725 (or 2494723 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 9978884 is about 3158.9371630344. The cubic root of 9978884 is about 215.2917186646.

The spelling of 9978884 in words is "nine million, nine hundred seventy-eight thousand, eight hundred eighty-four".