87823506 has 16 divisors (see below), whose sum is σ = 178624800. Its totient is φ = 28778208.

The previous prime is 87823493. The next prime is 87823511. The reversal of 87823506 is 60532878.

It is a super-2 number, since 2×87823506² = 15425936412264072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 123691 + ... + 124398.

It is an arithmetic number, because the mean of its divisors is an integer number (11164050).

Almost surely, 2^87823506 is an apocalyptic number.

87823506 is an abundant number, since it is smaller than the sum of its proper divisors (90801294).

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

87823506 is a wasteful number, since it uses less digits than its factorization.

87823506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248153.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 87823506 is about 9371.4196363198. The cubic root of 87823506 is about 444.4984561072.

The spelling of 87823506 in words is "eighty-seven million, eight hundred twenty-three thousand, five hundred six".