87043636 has 12 divisors (see below), whose sum is σ = 160343680. Its totient is φ = 41231160.

The previous prime is 87043633. The next prime is 87043639. The reversal of 87043636 is 63634078.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87043633) and next prime (87043639).

It is a junction number, because it is equal to n+sod(n) for n = 87043595 and 87043604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87043631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572580 + ... + 572731.

Almost surely, 2^87043636 is an apocalyptic number.

It is an amenable number.

87043636 is a deficient number, since it is larger than the sum of its proper divisors (73300044).

87043636 is a wasteful number, since it uses less digits than its factorization.

87043636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145334 (or 1145332 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 87043636 is about 9329.7178949848. The cubic root of 87043636 is about 443.1788314708.

The spelling of 87043636 in words is "eighty-seven million, forty-three thousand, six hundred thirty-six".