424236409 has 9 divisors (see below), whose sum is σ = 435240453. Its totient is φ = 413505372.

The previous prime is 424236367. The next prime is 424236419. The reversal of 424236409 is 904632424.

The square root of 424236409 is 20597.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 424236409 - 2¹⁵ = 424203641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (424236419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 885432 + ... + 885910.

Almost surely, 2^424236409 is an apocalyptic number.

424236409 is the 20597-th square number.

424236409 is the 10299-th centered octagonal number.

It is an amenable number.

424236409 is a deficient number, since it is larger than the sum of its proper divisors (11004044).

424236409 is an frugal number, since it uses more digits than its factorization.

424236409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The cubic root of 424236409 is about 751.3967506502.

The spelling of 424236409 in words is "four hundred twenty-four million, two hundred thirty-six thousand, four hundred nine".