87628465 has 4 divisors (see below), whose sum is σ = 105154164. Its totient is φ = 70102768.

The previous prime is 87628447. The next prime is 87628477. The reversal of 87628465 is 56482678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31438449 + 56190016 = 5607^2 + 7496^2 .

It is a cyclic number.

It is not a de Polignac number, because 87628465 - 2⁷ = 87628337 is a prime.

It is a super-3 number, since 3×87628465³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8762842 + ... + 8762851.

It is an arithmetic number, because the mean of its divisors is an integer number (26288541).

Almost surely, 2^87628465 is an apocalyptic number.

It is an amenable number.

87628465 is a deficient number, since it is larger than the sum of its proper divisors (17525699).

87628465 is a wasteful number, since it uses less digits than its factorization.

87628465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17525698.

The product of its digits is 645120, while the sum is 46.

The square root of 87628465 is about 9361.0076914828. The cubic root of 87628465 is about 444.1691605112.

The spelling of 87628465 in words is "eighty-seven million, six hundred twenty-eight thousand, four hundred sixty-five".