428244413 has 4 divisors (see below), whose sum is σ = 428311260. Its totient is φ = 428177568.

The previous prime is 428244407. The next prime is 428244449. The reversal of 428244413 is 314442824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 375855769 + 52388644 = 19387^2 + 7238^2 .

It is a cyclic number.

It is not a de Polignac number, because 428244413 - 2²⁰ = 427195837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428244413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428244473) 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, 22658 + ... + 37011.

It is an arithmetic number, because the mean of its divisors is an integer number (107077815).

Almost surely, 2^428244413 is an apocalyptic number.

It is an amenable number.

428244413 is a deficient number, since it is larger than the sum of its proper divisors (66847).

428244413 is an equidigital number, since it uses as much as digits as its factorization.

428244413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66846.

The product of its digits is 24576, while the sum is 32.

The square root of 428244413 is about 20694.0670966342. The cubic root of 428244413 is about 753.7556292374.

The spelling of 428244413 in words is "four hundred twenty-eight million, two hundred forty-four thousand, four hundred thirteen".