87647236 has 6 divisors (see below), whose sum is σ = 153382670. Its totient is φ = 43823616.

The previous prime is 87647233. The next prime is 87647243. The reversal of 87647236 is 63274678.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 87609600 + 37636 = 9360^2 + 194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87647192 and 87647201.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10955901 + ... + 10955908.

Almost surely, 2^87647236 is an apocalyptic number.

It is an amenable number.

87647236 is a deficient number, since it is larger than the sum of its proper divisors (65735434).

87647236 is a wasteful number, since it uses less digits than its factorization.

87647236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21911813 (or 21911811 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 87647236 is about 9362.0102542136. The cubic root of 87647236 is about 444.2008735855.

The spelling of 87647236 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred thirty-six".