87311916 has 36 divisors (see below), whose sum is σ = 232323000. Its totient is φ = 27571968.

The previous prime is 87311911. The next prime is 87311927. The reversal of 87311916 is 61911378.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×87311916³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (87311911) 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 11 ways as a sum of consecutive naturals, for example, 63141 + ... + 64508.

Almost surely, 2^87311916 is an apocalyptic number.

It is an amenable number.

87311916 is an abundant number, since it is smaller than the sum of its proper divisors (145011084).

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

87311916 is a wasteful number, since it uses less digits than its factorization.

87311916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127678 (or 127673 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 87311916 is about 9344.0845458504. The cubic root of 87311916 is about 443.6336764199.

The spelling of 87311916 in words is "eighty-seven million, three hundred eleven thousand, nine hundred sixteen".