228420422829 has 12 divisors (see below), whose sum is σ = 329951057436. Its totient is φ = 152275460352.

The previous prime is 228420422809. The next prime is 228420422873. The reversal of 228420422829 is 928224024822.

It can be written as a sum of positive squares in 2 ways, for example, as 11902373604 + 216518049225 = 109098^2 + 465315^2 .

It is not a de Polignac number, because 228420422829 - 2¹⁶ = 228420357293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228420422809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88932 + ... + 681725.

It is an arithmetic number, because the mean of its divisors is an integer number (27495921453).

Almost surely, 2^228420422829 is an apocalyptic number.

It is an amenable number.

228420422829 is a deficient number, since it is larger than the sum of its proper divisors (101530634607).

228420422829 is a wasteful number, since it uses less digits than its factorization.

228420422829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803596 (or 803593 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

It can be divided in two parts, 228420 and 422829, that added together give a square (651249 = 807²).

The spelling of 228420422829 in words is "two hundred twenty-eight billion, four hundred twenty million, four hundred twenty-two thousand, eight hundred twenty-nine".