87471912 has 32 divisors (see below), whose sum is σ = 238560480. Its totient is φ = 26506560.
The previous prime is 87471911. The next prime is 87471931. The reversal of 87471912 is 21917478.
It is not an unprimeable number, because it can be changed into a prime (87471911) 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, 165403 + ... + 165930.
It is an arithmetic number, because the mean of its divisors is an integer number (7455015).
Almost surely, 287471912 is an apocalyptic number.
It is an amenable number.
87471912 is an abundant number, since it is smaller than the sum of its proper divisors (151088568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
87471912 is a wasteful number, since it uses less digits than its factorization.
87471912 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 331353 (or 331349 counting only the distinct ones).
The product of its digits is 28224, while the sum is 39.
The square root of 87471912 is about 9352.6419796761. The cubic root of 87471912 is about 443.9044920777.
The spelling of 87471912 in words is "eighty-seven million, four hundred seventy-one thousand, nine hundred twelve".
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