87447378 has 16 divisors (see below), whose sum is σ = 174988800. Its totient is φ = 29133456.

The previous prime is 87447377. The next prime is 87447421. The reversal of 87447378 is 87374478.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87447377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15823 + ... + 20621.

It is an arithmetic number, because the mean of its divisors is an integer number (10936800).

Almost surely, 2^87447378 is an apocalyptic number.

87447378 is an abundant number, since it is smaller than the sum of its proper divisors (87541422).

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

87447378 is a wasteful number, since it uses less digits than its factorization.

87447378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841.

The product of its digits is 1053696, while the sum is 48.

The square root of 87447378 is about 9351.3302796982. The cubic root of 87447378 is about 443.8629862925.

Subtracting from 87447378 its reverse (87374478), we obtain a square (72900 = 270²).

The spelling of 87447378 in words is "eighty-seven million, four hundred forty-seven thousand, three hundred seventy-eight".