87447870 has 64 divisors (see below), whose sum is σ = 234743040. Its totient is φ = 23164704.

The previous prime is 87447859. The next prime is 87447907. The reversal of 87447870 is 7874478.

It is a hoax number, since the sum of its digits (45) 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43017 + ... + 45003.

It is an arithmetic number, because the mean of its divisors is an integer number (3667860).

Almost surely, 2^87447870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87447870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117371520).

87447870 is an abundant number, since it is smaller than the sum of its proper divisors (147295170).

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

87447870 is a wasteful number, since it uses less digits than its factorization.

87447870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 87447870 is about 9351.3565860788. The cubic root of 87447870 is about 443.8638187176.

The spelling of 87447870 in words is "eighty-seven million, four hundred forty-seven thousand, eight hundred seventy".