402760165 has 4 divisors (see below), whose sum is σ = 483312204. Its totient is φ = 322208128.

The previous prime is 402760151. The next prime is 402760177. The reversal of 402760165 is 561067204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135699201 + 267060964 = 11649^2 + 16342^2 .

It is a cyclic number.

It is not a de Polignac number, because 402760165 - 2¹⁷ = 402629093 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40276012 + ... + 40276021.

It is an arithmetic number, because the mean of its divisors is an integer number (120828051).

Almost surely, 2^402760165 is an apocalyptic number.

It is an amenable number.

402760165 is a deficient number, since it is larger than the sum of its proper divisors (80552039).

402760165 is an equidigital number, since it uses as much as digits as its factorization.

402760165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80552038.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 402760165 is about 20068.8854947154. The cubic root of 402760165 is about 738.4971722324.

The spelling of 402760165 in words is "four hundred two million, seven hundred sixty thousand, one hundred sixty-five".