87212438900 has 36 divisors (see below), whose sum is σ = 189265347180. Its totient is φ = 34882329600.

The previous prime is 87212438869. The next prime is 87212438903. The reversal of 87212438900 is 983421278.

It can be written as a sum of positive squares in 6 ways, for example, as 6576885604 + 80635553296 = 81098^2 + 283964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87212438903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1794116 + ... + 1842084.

It is an arithmetic number, because the mean of its divisors is an integer number (5257370755).

Almost surely, 2^87212438900 is an apocalyptic number.

It is an amenable number.

87212438900 is an abundant number, since it is smaller than the sum of its proper divisors (102052908280).

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

87212438900 is a wasteful number, since it uses less digits than its factorization.

87212438900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66164 (or 66157 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 87212438900 in words is "eighty-seven billion, two hundred twelve million, four hundred thirty-eight thousand, nine hundred".