87720222976 has 81 divisors (see below), whose sum is σ = 177777089581. Its totient is φ = 43199046656.

The previous prime is 87720222971. The next prime is 87720223027. The reversal of 87720222976 is 67922202778.

The square root of 87720222976 is 296176.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 79794950400 + 7925272576 = 282480^2 + 89024^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87720222971) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 507053226 + ... + 507053398.

Almost surely, 2^87720222976 is an apocalyptic number.

87720222976 is the 296176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87720222976

87720222976 is an abundant number, since it is smaller than the sum of its proper divisors (90056866605).

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

87720222976 is an frugal number, since it uses more digits than its factorization.

87720222976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 87720222976 in words is "eighty-seven billion, seven hundred twenty million, two hundred twenty-two thousand, nine hundred seventy-six".