402228609 has 8 divisors (see below), whose sum is σ = 540163680. Its totient is φ = 266222976.

The previous prime is 402228581. The next prime is 402228641. The reversal of 402228609 is 906822204.

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

It is not a de Polignac number, because 402228609 - 2⁷ = 402228481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402228609.

It is not an unprimeable number, because it can be changed into a prime (402228509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481872 + ... + 482705.

It is an arithmetic number, because the mean of its divisors is an integer number (67520460).

Almost surely, 2^402228609 is an apocalyptic number.

It is an amenable number.

402228609 is a deficient number, since it is larger than the sum of its proper divisors (137935071).

402228609 is a wasteful number, since it uses less digits than its factorization.

402228609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964719.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 402228609 is about 20055.6378357807. The cubic root of 402228609 is about 738.1721438752.

The spelling of 402228609 in words is "four hundred two million, two hundred twenty-eight thousand, six hundred nine".