86628641 has 4 divisors (see below), whose sum is σ = 94503984. Its totient is φ = 78753300.

The previous prime is 86628611. The next prime is 86628643. The reversal of 86628641 is 14682668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86628641 - 2¹⁰ = 86627617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86628643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3937655 + ... + 3937676.

It is an arithmetic number, because the mean of its divisors is an integer number (23625996).

Almost surely, 2^86628641 is an apocalyptic number.

It is an amenable number.

86628641 is a deficient number, since it is larger than the sum of its proper divisors (7875343).

86628641 is a wasteful number, since it uses less digits than its factorization.

86628641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875342.

The product of its digits is 110592, while the sum is 41.

The square root of 86628641 is about 9307.4508325320. The cubic root of 86628641 is about 442.4733996160.

The spelling of 86628641 in words is "eighty-six million, six hundred twenty-eight thousand, six hundred forty-one".