9911970 has 48 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 2642544.

The previous prime is 9911963. The next prime is 9911983. The reversal of 9911970 is 791199.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391 + ... + 4469.

It is an arithmetic number, because the mean of its divisors is an integer number (556920).

Almost surely, 2^9911970 is an apocalyptic number.

9911970 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9911970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13366080).

9911970 is an abundant number, since it is smaller than the sum of its proper divisors (16820190).

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

9911970 is a wasteful number, since it uses less digits than its factorization.

9911970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 9911970 is about 3148.3281277529. The cubic root of 9911970 is about 214.8094218894.

It can be divided in two parts, 99 and 11970, that multiplied together give a triangular number (1185030 = T₁₅₃₉).

The spelling of 9911970 in words is "nine million, nine hundred eleven thousand, nine hundred seventy".