87420224 has 28 divisors (see below), whose sum is σ = 174127668. Its totient is φ = 43545600.

The previous prime is 87420211. The next prime is 87420227. The reversal of 87420224 is 42202478.

It can be written as a sum of positive squares in 2 ways, for example, as 71098624 + 16321600 = 8432^2 + 4040^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87420227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15554 + ... + 20414.

Almost surely, 2^87420224 is an apocalyptic number.

It is an amenable number.

87420224 is a deficient number, since it is larger than the sum of its proper divisors (86707444).

87420224 is a wasteful number, since it uses less digits than its factorization.

87420224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 87420224 is about 9349.8782879779. The cubic root of 87420224 is about 443.8170390286.

The spelling of 87420224 in words is "eighty-seven million, four hundred twenty thousand, two hundred twenty-four".