9961864 has 32 divisors (see below), whose sum is σ = 21578400. Its totient is φ = 4261120.

The previous prime is 9961841. The next prime is 9961867. The reversal of 9961864 is 4681699.

9961864 = T₁₇ + T₁₈ + ... + T₃₉₀.

It is a self number, because there is not a number n which added to its sum of digits gives 9961864.

It is not an unprimeable number, because it can be changed into a prime (9961867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1834 + ... + 4825.

It is an arithmetic number, because the mean of its divisors is an integer number (674325).

Almost surely, 2^9961864 is an apocalyptic number.

It is an amenable number.

9961864 is an abundant number, since it is smaller than the sum of its proper divisors (11616536).

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

9961864 is a wasteful number, since it uses less digits than its factorization.

9961864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693 (or 6689 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 9961864 is about 3156.2420692970. The cubic root of 9961864 is about 215.1692483802.

The spelling of 9961864 in words is "nine million, nine hundred sixty-one thousand, eight hundred sixty-four".