402008105 has 8 divisors (see below), whose sum is σ = 487830600. Its totient is φ = 317992576.

The previous prime is 402008081. The next prime is 402008111. The reversal of 402008105 is 501800204.

It can be written as a sum of positive squares in 4 ways, for example, as 31214569 + 370793536 = 5587^2 + 19256^2 .

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 402008105 - 2²⁴ = 385230889 is a prime.

It is a super-2 number, since 2×402008105² = 323221032971382050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451250 + ... + 452139.

It is an arithmetic number, because the mean of its divisors is an integer number (60978825).

Almost surely, 2^402008105 is an apocalyptic number.

It is an amenable number.

402008105 is a deficient number, since it is larger than the sum of its proper divisors (85822495).

402008105 is an equidigital number, since it uses as much as digits as its factorization.

402008105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903483.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 402008105 is about 20050.1397750739. The cubic root of 402008105 is about 738.0372291695.

Adding to 402008105 its reverse (501800204), we get a palindrome (903808309).

The spelling of 402008105 in words is "four hundred two million, eight thousand, one hundred five".