87647280 has 240 divisors, whose sum is σ = 328237920. Its totient is φ = 19267584.

The previous prime is 87647279. The next prime is 87647303. The reversal of 87647280 is 8274678.

It is a tau number, because it is divible by the number of its divisors (240).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 47 ways as a sum of consecutive naturals, for example, 340912 + ... + 341168.

It is an arithmetic number, because the mean of its divisors is an integer number (1367658).

Almost surely, 2^87647280 is an apocalyptic number.

87647280 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 87647280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164118960).

87647280 is an abundant number, since it is smaller than the sum of its proper divisors (240590640).

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

87647280 is a wasteful number, since it uses less digits than its factorization.

87647280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 87647280 is about 9362.0126041359. The cubic root of 87647280 is about 444.2009479169.

The spelling of 87647280 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred eighty".