870537218 has 4 divisors (see below), whose sum is σ = 1305805830. Its totient is φ = 435268608.

The previous prime is 870537209. The next prime is 870537223. The reversal of 870537218 is 812735078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812735078 = 2 ⋅406367539.

It can be written as a sum of positive squares in only one way, i.e., 867125809 + 3411409 = 29447^2 + 1847^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217634303 + ... + 217634306.

Almost surely, 2^870537218 is an apocalyptic number.

870537218 is a deficient number, since it is larger than the sum of its proper divisors (435268612).

870537218 is a wasteful number, since it uses less digits than its factorization.

870537218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435268611.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 870537218 is about 29504.8677000931. The cubic root of 870537218 is about 954.8367247341.

The spelling of 870537218 in words is "eight hundred seventy million, five hundred thirty-seven thousand, two hundred eighteen".