869133720 has 512 divisors, whose sum is σ = 3483648000. Its totient is φ = 168376320.

The previous prime is 869133719. The next prime is 869133743. The reversal of 869133720 is 27331968.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12241285 + ... + 12241355.

It is an arithmetic number, because the mean of its divisors is an integer number (6804000).

Almost surely, 2^869133720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869133720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741824000).

869133720 is an abundant number, since it is smaller than the sum of its proper divisors (2614514280).

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

869133720 is a wasteful number, since it uses less digits than its factorization.

869133720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 869133720 is about 29481.0739288785. The cubic root of 869133720 is about 954.3233129249.

The spelling of 869133720 in words is "eight hundred sixty-nine million, one hundred thirty-three thousand, seven hundred twenty".