87804285 has 24 divisors (see below), whose sum is σ = 142275360. Its totient is φ = 46240128.

The previous prime is 87804251. The next prime is 87804287. The reversal of 87804285 is 58240878.

It is not a de Polignac number, because 87804285 - 2⁶ = 87804221 is a prime.

It is a super-2 number, since 2×87804285² = 15419184928722450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87804287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118446 + ... + 119184.

It is an arithmetic number, because the mean of its divisors is an integer number (5928140).

Almost surely, 2^87804285 is an apocalyptic number.

It is an amenable number.

87804285 is a deficient number, since it is larger than the sum of its proper divisors (54471075).

87804285 is an equidigital number, since it uses as much as digits as its factorization.

87804285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 87804285 is about 9370.3940685544. The cubic root of 87804285 is about 444.4660261858.

The spelling of 87804285 in words is "eighty-seven million, eight hundred four thousand, two hundred eighty-five".