86628751 has 4 divisors (see below), whose sum is σ = 94504104. Its totient is φ = 78753400.

The previous prime is 86628743. The next prime is 86628757. The reversal of 86628751 is 15782668.

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

It is not a de Polignac number, because 86628751 - 2³ = 86628743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86628698 and 86628707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86628757) 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, 3937660 + ... + 3937681.

It is an arithmetic number, because the mean of its divisors is an integer number (23626026).

Almost surely, 2^86628751 is an apocalyptic number.

86628751 is a deficient number, since it is larger than the sum of its proper divisors (7875353).

86628751 is a wasteful number, since it uses less digits than its factorization.

86628751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875352.

The product of its digits is 161280, while the sum is 43.

The square root of 86628751 is about 9307.4567417743. The cubic root of 86628751 is about 442.4735868984.

The spelling of 86628751 in words is "eighty-six million, six hundred twenty-eight thousand, seven hundred fifty-one".