87761536 has 16 divisors (see below), whose sum is σ = 174837690. Its totient is φ = 43880704.

The previous prime is 87761533. The next prime is 87761543. The reversal of 87761536 is 63516778.

It can be written as a sum of positive squares in only one way, i.e., 85377600 + 2383936 = 9240^2 + 1544^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 87761492 and 87761501.

It is not an unprimeable number, because it can be changed into a prime (87761533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342691 + ... + 342946.

Almost surely, 2^87761536 is an apocalyptic number.

It is an amenable number.

87761536 is a deficient number, since it is larger than the sum of its proper divisors (87076154).

87761536 is an equidigital number, since it uses as much as digits as its factorization.

87761536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685651 (or 685639 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 87761536 is about 9368.1127234892. The cubic root of 87761536 is about 444.3938825444.

The spelling of 87761536 in words is "eighty-seven million, seven hundred sixty-one thousand, five hundred thirty-six".