9978036 has 12 divisors (see below), whose sum is σ = 23282112. Its totient is φ = 3326008.

The previous prime is 9977999. The next prime is 9978037. The reversal of 9978036 is 6308799.

It is a happy number.

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

It is a super-2 number, since 2×9978036² = 199122404834592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978037) 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, 415740 + ... + 415763.

It is an arithmetic number, because the mean of its divisors is an integer number (1940176).

Almost surely, 2^9978036 is an apocalyptic number.

It is an amenable number.

9978036 is an abundant number, since it is smaller than the sum of its proper divisors (13304076).

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

9978036 is a wasteful number, since it uses less digits than its factorization.

9978036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831510 (or 831508 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 9978036 is about 3158.8029378231. The cubic root of 9978036 is about 215.2856200351.

The spelling of 9978036 in words is "nine million, nine hundred seventy-eight thousand, thirty-six".