87448212 has 18 divisors (see below), whose sum is σ = 221049738. Its totient is φ = 29149392.

The previous prime is 87448183. The next prime is 87448217. The reversal of 87448212 is 21284478.

It can be written as a sum of positive squares in only one way, i.e., 73205136 + 14243076 = 8556^2 + 3774^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2429117 = 87448212 / (8 + 7 + 4 + 4 + 8 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87448217) 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 5 ways as a sum of consecutive naturals, for example, 1214523 + ... + 1214594.

It is an arithmetic number, because the mean of its divisors is an integer number (12280541).

Almost surely, 2^87448212 is an apocalyptic number.

It is an amenable number.

87448212 is an abundant number, since it is smaller than the sum of its proper divisors (133601526).

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

87448212 is a wasteful number, since it uses less digits than its factorization.

87448212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429127 (or 2429122 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 87448212 is about 9351.3748721779. The cubic root of 87448212 is about 443.8643973527.

The spelling of 87448212 in words is "eighty-seven million, four hundred forty-eight thousand, two hundred twelve".