870256128 has 160 divisors (see below), whose sum is σ = 2741967360. Its totient is φ = 239984640.

The previous prime is 870256117. The next prime is 870256139. The reversal of 870256128 is 821652078.

It is an interprime number because it is at equal distance from previous prime (870256117) and next prime (870256139).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310413 + ... + 313203.

It is an arithmetic number, because the mean of its divisors is an integer number (17137296).

Almost surely, 2^870256128 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 870256128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370983680).

870256128 is an abundant number, since it is smaller than the sum of its proper divisors (1871711232).

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

870256128 is a wasteful number, since it uses less digits than its factorization.

870256128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2832 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 870256128 is about 29500.1038642239. The cubic root of 870256128 is about 954.7339437761.

The spelling of 870256128 in words is "eight hundred seventy million, two hundred fifty-six thousand, one hundred twenty-eight".