87311272 has 8 divisors (see below), whose sum is σ = 163708650. Its totient is φ = 43655632.

The previous prime is 87311249. The next prime is 87311281. The reversal of 87311272 is 27211378.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 15163236 = 8494^2 + 3894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5456947 + ... + 5456962.

Almost surely, 2^87311272 is an apocalyptic number.

It is an amenable number.

87311272 is a deficient number, since it is larger than the sum of its proper divisors (76397378).

87311272 is a wasteful number, since it uses less digits than its factorization.

87311272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10913915 (or 10913911 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 87311272 is about 9344.0500854822. The cubic root of 87311272 is about 443.6325856914.

The spelling of 87311272 in words is "eighty-seven million, three hundred eleven thousand, two hundred seventy-two".