870129216 has 140 divisors (see below), whose sum is σ = 2814005040. Its totient is φ = 263658240.

The previous prime is 870129133. The next prime is 870129217. The reversal of 870129216 is 612921078.

870129216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (870129217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49395 + ... + 64653.

It is an arithmetic number, because the mean of its divisors is an integer number (20100036).

Almost surely, 2^870129216 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 870129216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1407002520).

870129216 is an abundant number, since it is smaller than the sum of its proper divisors (1943875824).

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

870129216 is a wasteful number, since it uses less digits than its factorization.

870129216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15294 (or 15275 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 870129216 is about 29497.9527425210. The cubic root of 870129216 is about 954.6875309708.

The spelling of 870129216 in words is "eight hundred seventy million, one hundred twenty-nine thousand, two hundred sixteen".