87647238 has 32 divisors (see below), whose sum is σ = 222597120. Its totient is φ = 25041960.

The previous prime is 87647233. The next prime is 87647243. The reversal of 87647238 is 83274678.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87647233) and next prime (87647243).

It is a junction number, because it is equal to n+sod(n) for n = 87647193 and 87647202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87647233) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 115558 + ... + 116313.

It is an arithmetic number, because the mean of its divisors is an integer number (6956160).

Almost surely, 2^87647238 is an apocalyptic number.

87647238 is an abundant number, since it is smaller than the sum of its proper divisors (134949882).

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

87647238 is a wasteful number, since it uses less digits than its factorization.

87647238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231889 (or 231883 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 87647238 is about 9362.0103610282. The cubic root of 87647238 is about 444.2008769642.

The spelling of 87647238 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred thirty-eight".