87105540 has 24 divisors (see below), whose sum is σ = 243895680. Its totient is φ = 23228128.

The previous prime is 87105533. The next prime is 87105541. The reversal of 87105540 is 4550178.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 87105498 and 87105507.

It is not an unprimeable number, because it can be changed into a prime (87105541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725820 + ... + 725939.

It is an arithmetic number, because the mean of its divisors is an integer number (10162320).

Almost surely, 2^87105540 is an apocalyptic number.

It is an amenable number.

87105540 is an abundant number, since it is smaller than the sum of its proper divisors (156790140).

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

87105540 is a wasteful number, since it uses less digits than its factorization.

87105540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451771 (or 1451769 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 87105540 is about 9333.0348761804. The cubic root of 87105540 is about 443.2838670696.

The spelling of 87105540 in words is "eighty-seven million, one hundred five thousand, five hundred forty".