8820629785 has 32 divisors (see below), whose sum is σ = 11766866688. Its totient is φ = 6293790720.

The previous prime is 8820629761. The next prime is 8820629791. The reversal of 8820629785 is 5879260288.

It is a happy number.

It is not a de Polignac number, because 8820629785 - 2⁹ = 8820629273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769204 + ... + 780586.

It is an arithmetic number, because the mean of its divisors is an integer number (367714584).

Almost surely, 2^8820629785 is an apocalyptic number.

It is an amenable number.

8820629785 is a deficient number, since it is larger than the sum of its proper divisors (2946236903).

8820629785 is a wasteful number, since it uses less digits than its factorization.

8820629785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11665.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 8820629785 is about 93918.2079524519. The cubic root of 8820629785 is about 2066.1722837417.

The spelling of 8820629785 in words is "eight billion, eight hundred twenty million, six hundred twenty-nine thousand, seven hundred eighty-five".