871961604 has 48 divisors (see below), whose sum is σ = 2152980480. Its totient is φ = 273900960.

The previous prime is 871961593. The next prime is 871961627. The reversal of 871961604 is 406169178.

871961604 = T₁₇ + T₁₈ + ... + T₁₇₃₅.

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 in 15 ways as a sum of consecutive naturals, for example, 33537 + ... + 53559.

It is an arithmetic number, because the mean of its divisors is an integer number (44853760).

Almost surely, 2^871961604 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 871961604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076490240).

871961604 is an abundant number, since it is smaller than the sum of its proper divisors (1281018876).

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

871961604 is a wasteful number, since it uses less digits than its factorization.

871961604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20240 (or 20238 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 871961604 is about 29528.9959869956. The cubic root of 871961604 is about 955.3572136640.

It can be divided in two parts, 87 and 1961604, that added together give a palindrome (1961691).

The spelling of 871961604 in words is "eight hundred seventy-one million, nine hundred sixty-one thousand, six hundred four".