870656490 has 96 divisors (see below), whose sum is σ = 2576935296. Its totient is φ = 201886080.

The previous prime is 870656453. The next prime is 870656519. The reversal of 870656490 is 94656078.

870656490 is a `hidden beast` number, since 87 + 0 + 6 + 564 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3652 + ... + 41888.

It is an arithmetic number, because the mean of its divisors is an integer number (26843076).

Almost surely, 2^870656490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870656490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288467648).

870656490 is an abundant number, since it is smaller than the sum of its proper divisors (1706278806).

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

870656490 is a wasteful number, since it uses less digits than its factorization.

870656490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38284 (or 38281 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 870656490 is about 29506.8888566721. Note that the first 4 decimals coincide. The cubic root of 870656490 is about 954.8803300247.

The spelling of 870656490 in words is "eight hundred seventy million, six hundred fifty-six thousand, four hundred ninety".