867291128 has 64 divisors (see below), whose sum is σ = 1814814720. Its totient is φ = 385257600.

The previous prime is 867291127. The next prime is 867291143. The reversal of 867291128 is 821192768.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867291127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792950 + ... + 794042.

It is an arithmetic number, because the mean of its divisors is an integer number (28356480).

Almost surely, 2^867291128 is an apocalyptic number.

867291128 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 867291128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907407360).

867291128 is an abundant number, since it is smaller than the sum of its proper divisors (947523592).

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

867291128 is a wasteful number, since it uses less digits than its factorization.

867291128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 1304 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 867291128 is about 29449.8069263620. The cubic root of 867291128 is about 953.6484368695.

The spelling of 867291128 in words is "eight hundred sixty-seven million, two hundred ninety-one thousand, one hundred twenty-eight".