8820721234 has 32 divisors (see below), whose sum is σ = 15046980480. Its totient is φ = 3844444032.

The previous prime is 8820721213. The next prime is 8820721241. The reversal of 8820721234 is 4321270288.

It is a junction number, because it is equal to n+sod(n) for n = 8820721193 and 8820721202.

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 15 ways as a sum of consecutive naturals, for example, 126099 + ... + 183145.

It is an arithmetic number, because the mean of its divisors is an integer number (470218140).

Almost surely, 2^8820721234 is an apocalyptic number.

8820721234 is a deficient number, since it is larger than the sum of its proper divisors (6226259246).

8820721234 is a wasteful number, since it uses less digits than its factorization.

8820721234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57394.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8820721234 is about 93918.6948056669. The cubic root of 8820721234 is about 2066.1794241516.

The spelling of 8820721234 in words is "eight billion, eight hundred twenty million, seven hundred twenty-one thousand, two hundred thirty-four".