87648685 has 8 divisors (see below), whose sum is σ = 111365496. Its totient is φ = 65994240.

The previous prime is 87648667. The next prime is 87648721. The reversal of 87648685 is 58684678.

It can be written as a sum of positive squares in 4 ways, for example, as 22410756 + 65237929 = 4734^2 + 8077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87648685 - 2¹⁹ = 87124397 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 515496 + ... + 515665.

It is an arithmetic number, because the mean of its divisors is an integer number (13920687).

Almost surely, 2^87648685 is an apocalyptic number.

87648685 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87648685 is a deficient number, since it is larger than the sum of its proper divisors (23716811).

87648685 is a wasteful number, since it uses less digits than its factorization.

87648685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031183.

The product of its digits is 2580480, while the sum is 52.

The square root of 87648685 is about 9362.0876411194. The cubic root of 87648685 is about 444.2033214418.

The spelling of 87648685 in words is "eighty-seven million, six hundred forty-eight thousand, six hundred eighty-five".