87888722 has 4 divisors (see below), whose sum is σ = 131833086. Its totient is φ = 43944360.

The previous prime is 87888721. The next prime is 87888733. The reversal of 87888722 is 22788878.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71250481 + 16638241 = 8441^2 + 4079^2 .

It is not an unprimeable number, because it can be changed into a prime (87888721) 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 as a sum of consecutive naturals, namely, 21972179 + ... + 21972182.

Almost surely, 2^87888722 is an apocalyptic number.

87888722 is a deficient number, since it is larger than the sum of its proper divisors (43944364).

87888722 is a wasteful number, since it uses less digits than its factorization.

87888722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43944363.

The product of its digits is 802816, while the sum is 50.

The square root of 87888722 is about 9374.8985061173. The cubic root of 87888722 is about 444.6084541407.

The spelling of 87888722 in words is "eighty-seven million, eight hundred eighty-eight thousand, seven hundred twenty-two".