861996120 has 32 divisors (see below), whose sum is σ = 2585988720. Its totient is φ = 229865600.

The previous prime is 861996073. The next prime is 861996127. The reversal of 861996120 is 21699168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861996127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3591531 + ... + 3591770.

Almost surely, 2^861996120 is an apocalyptic number.

It is an amenable number.

861996120 is an abundant number, since it is smaller than the sum of its proper divisors (1723992600).

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

861996120 is a wasteful number, since it uses less digits than its factorization.

861996120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183315 (or 7183311 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 861996120 is about 29359.7704350698. The cubic root of 861996120 is about 951.7037275697.

The spelling of 861996120 in words is "eight hundred sixty-one million, nine hundred ninety-six thousand, one hundred twenty".