87520228 has 6 divisors (see below), whose sum is σ = 153160406. Its totient is φ = 43760112.

The previous prime is 87520201. The next prime is 87520241. The reversal of 87520228 is 82202578.

It can be written as a sum of positive squares in only one way, i.e., 69355584 + 18164644 = 8328^2 + 4262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87520193 and 87520202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10940025 + ... + 10940032.

Almost surely, 2^87520228 is an apocalyptic number.

It is an amenable number.

87520228 is a deficient number, since it is larger than the sum of its proper divisors (65640178).

87520228 is a wasteful number, since it uses less digits than its factorization.

87520228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21880061 (or 21880059 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 87520228 is about 9355.2246365333. The cubic root of 87520228 is about 443.9862087538.

The spelling of 87520228 in words is "eighty-seven million, five hundred twenty thousand, two hundred twenty-eight".