87384061440 has 640 divisors, whose sum is σ = 338778316800. Its totient is φ = 21220392960.

The previous prime is 87384061363. The next prime is 87384061447. The reversal of 87384061440 is 4416048378.

87384061440 is a `hidden beast` number, since 8 + 73 + 84 + 0 + 61 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87384061447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70985625 + ... + 70986855.

It is an arithmetic number, because the mean of its divisors is an integer number (529341120).

Almost surely, 2^87384061440 is an apocalyptic number.

87384061440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87384061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169389158400).

87384061440 is an abundant number, since it is smaller than the sum of its proper divisors (251394255360).

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

87384061440 is a wasteful number, since it uses less digits than its factorization.

87384061440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 87384061440 in words is "eighty-seven billion, three hundred eighty-four million, sixty-one thousand, four hundred forty".