871539280 has 40 divisors (see below), whose sum is σ = 2029350024. Its totient is φ = 348096000.

The previous prime is 871539241. The next prime is 871539307. The reversal of 871539280 is 82935178.

It can be written as a sum of positive squares in 4 ways, for example, as 339591184 + 531948096 = 18428^2 + 23064^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48310 + ... + 63850.

Almost surely, 2^871539280 is an apocalyptic number.

871539280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

871539280 is an abundant number, since it is smaller than the sum of its proper divisors (1157810744).

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

871539280 is a wasteful number, since it uses less digits than its factorization.

871539280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16255 (or 16249 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 871539280 is about 29521.8441158407. The cubic root of 871539280 is about 955.2029502063.

The spelling of 871539280 in words is "eight hundred seventy-one million, five hundred thirty-nine thousand, two hundred eighty".