87273818 has 16 divisors (see below), whose sum is σ = 143392680. Its totient is φ = 39653376.

The previous prime is 87273779. The next prime is 87273841. The reversal of 87273818 is 81837278.

It can be written as a sum of positive squares in 4 ways, for example, as 87179569 + 94249 = 9337^2 + 307^2 .

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, 43271 + ... + 45242.

Almost surely, 2^87273818 is an apocalyptic number.

87273818 is a deficient number, since it is larger than the sum of its proper divisors (56118862).

87273818 is a wasteful number, since it uses less digits than its factorization.

87273818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88561.

The product of its digits is 150528, while the sum is 44.

The square root of 87273818 is about 9342.0457074455. The cubic root of 87273818 is about 443.5691414535.

The spelling of 87273818 in words is "eighty-seven million, two hundred seventy-three thousand, eight hundred eighteen".