436440421 has 8 divisors (see below), whose sum is σ = 446170104. Its totient is φ = 426793920.

The previous prime is 436440409. The next prime is 436440427. The reversal of 436440421 is 124044634.

It can be written as a sum of positive squares in 4 ways, for example, as 72165025 + 364275396 = 8495^2 + 19086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 436440421 - 2⁷ = 436440293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 436440421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436440427) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10126 + ... + 31231.

It is an arithmetic number, because the mean of its divisors is an integer number (55771263).

Almost surely, 2^436440421 is an apocalyptic number.

It is an amenable number.

436440421 is a deficient number, since it is larger than the sum of its proper divisors (9729683).

436440421 is a wasteful number, since it uses less digits than its factorization.

436440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41591.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 436440421 is about 20891.1565261476. The cubic root of 436440421 is about 758.5338892749.

The spelling of 436440421 in words is "four hundred thirty-six million, four hundred forty thousand, four hundred twenty-one".