402489663 has 8 divisors (see below), whose sum is σ = 551157168. Its totient is φ = 261074304.

The previous prime is 402489643. The next prime is 402489667. The reversal of 402489663 is 366984204.

It is a happy number.

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

It is not a de Polignac number, because 402489663 - 2¹⁷ = 402358591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402489667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812906 + ... + 1813127.

It is an arithmetic number, because the mean of its divisors is an integer number (68894646).

Almost surely, 2^402489663 is an apocalyptic number.

402489663 is a deficient number, since it is larger than the sum of its proper divisors (148667505).

402489663 is a wasteful number, since it uses less digits than its factorization.

402489663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626073.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 402489663 is about 20062.1450248970. The cubic root of 402489663 is about 738.3318052488.

The spelling of 402489663 in words is "four hundred two million, four hundred eighty-nine thousand, six hundred sixty-three".