402406165 has 16 divisors (see below), whose sum is σ = 552625920. Its totient is φ = 275558400.

The previous prime is 402406163. The next prime is 402406181. The reversal of 402406165 is 561604204.

It is not a de Polignac number, because 402406165 - 2¹ = 402406163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402406163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19440 + ... + 34390.

It is an arithmetic number, because the mean of its divisors is an integer number (34539120).

Almost surely, 2^402406165 is an apocalyptic number.

It is an amenable number.

402406165 is a deficient number, since it is larger than the sum of its proper divisors (150219755).

402406165 is a wasteful number, since it uses less digits than its factorization.

402406165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15732.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 402406165 is about 20060.0639330985. The cubic root of 402406165 is about 738.2807451443.

The spelling of 402406165 in words is "four hundred two million, four hundred six thousand, one hundred sixty-five".