87645258 has 12 divisors (see below), whose sum is σ = 189898098. Its totient is φ = 29215080.

The previous prime is 87645253. The next prime is 87645281. The reversal of 87645258 is 85254678.

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 91809 = 9357^2 + 303^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87645253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2434573 + ... + 2434608.

Almost surely, 2^87645258 is an apocalyptic number.

87645258 is an abundant number, since it is smaller than the sum of its proper divisors (102252840).

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

87645258 is a wasteful number, since it uses less digits than its factorization.

87645258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4869189 (or 4869186 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 87645258 is about 9361.9046139127. The cubic root of 87645258 is about 444.1975320238.

The spelling of 87645258 in words is "eighty-seven million, six hundred forty-five thousand, two hundred fifty-eight".