87471944 has 64 divisors (see below), whose sum is σ = 197648640. Its totient is φ = 35481600.

The previous prime is 87471941. The next prime is 87471947. The reversal of 87471944 is 44917478.

It is an interprime number because it is at equal distance from previous prime (87471941) and next prime (87471947).

It is a junction number, because it is equal to n+sod(n) for n = 87471895 and 87471904.

It is not an unprimeable number, because it can be changed into a prime (87471941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145244 + ... + 145844.

It is an arithmetic number, because the mean of its divisors is an integer number (3088260).

Almost surely, 2^87471944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87471944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98824320).

87471944 is an abundant number, since it is smaller than the sum of its proper divisors (110176696).

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

87471944 is a wasteful number, since it uses less digits than its factorization.

87471944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 746 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 87471944 is about 9352.6436904225. The cubic root of 87471944 is about 443.9045462091.

The spelling of 87471944 in words is "eighty-seven million, four hundred seventy-one thousand, nine hundred forty-four".