87203812 has 24 divisors (see below), whose sum is σ = 167159160. Its totient is φ = 39621120.

The previous prime is 87203807. The next prime is 87203827. The reversal of 87203812 is 21830278.

It can be written as a sum of positive squares in 4 ways, for example, as 52911076 + 34292736 = 7274^2 + 5856^2 .

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, 20139 + ... + 24082.

It is an arithmetic number, because the mean of its divisors is an integer number (6964965).

Almost surely, 2^87203812 is an apocalyptic number.

It is an amenable number.

87203812 is a deficient number, since it is larger than the sum of its proper divisors (79955348).

87203812 is a wasteful number, since it uses less digits than its factorization.

87203812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44271 (or 44269 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 87203812 is about 9338.2981318868. The cubic root of 87203812 is about 443.4505079061.

The spelling of 87203812 in words is "eighty-seven million, two hundred three thousand, eight hundred twelve".