87111040 has 32 divisors (see below), whose sum is σ = 208251360. Its totient is φ = 34844160.

The previous prime is 87110999. The next prime is 87111083. The reversal of 87111040 is 4011178.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67416 + ... + 68695.

It is an arithmetic number, because the mean of its divisors is an integer number (6507855).

Almost surely, 2^87111040 is an apocalyptic number.

87111040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87111040 is an abundant number, since it is smaller than the sum of its proper divisors (121140320).

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

87111040 is a wasteful number, since it uses less digits than its factorization.

87111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136130 (or 136118 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 87111040 is about 9333.3295238087. The cubic root of 87111040 is about 443.2931967860.

It can be divided in two parts, 871 and 11040, that added together give a palindrome (11911).

The spelling of 87111040 in words is "eighty-seven million, one hundred eleven thousand, forty".