402173869 has 8 divisors (see below), whose sum is σ = 405418520. Its totient is φ = 398938176.

The previous prime is 402173867. The next prime is 402173897. The reversal of 402173869 is 968371204.

It can be written as a sum of positive squares in 4 ways, for example, as 35259844 + 366914025 = 5938^2 + 19155^2 .

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 402173869 - 2¹ = 402173867 is a prime.

It is a super-2 number, since 2×402173869² = 323487641812858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402173867) 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, 109507 + ... + 113119.

It is an arithmetic number, because the mean of its divisors is an integer number (50677315).

Almost surely, 2^402173869 is an apocalyptic number.

It is an amenable number.

402173869 is a deficient number, since it is larger than the sum of its proper divisors (3244651).

402173869 is a wasteful number, since it uses less digits than its factorization.

402173869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 402173869 is about 20054.2730858039. The cubic root of 402173869 is about 738.1386559735.

The spelling of 402173869 in words is "four hundred two million, one hundred seventy-three thousand, eight hundred sixty-nine".