87091760 has 40 divisors (see below), whose sum is σ = 231416736. Its totient is φ = 29859840.

The previous prime is 87091757. The next prime is 87091769. The reversal of 87091760 is 6719078.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87091769) 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 7 ways as a sum of consecutive naturals, for example, 77201 + ... + 78320.

Almost surely, 2^87091760 is an apocalyptic number.

87091760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87091760 is an abundant number, since it is smaller than the sum of its proper divisors (144324976).

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

87091760 is a wasteful number, since it uses less digits than its factorization.

87091760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155541 (or 155535 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 87091760 is about 9332.2966090882. The cubic root of 87091760 is about 443.2604901645.

The spelling of 87091760 in words is "eighty-seven million, ninety-one thousand, seven hundred sixty".