400415165 has 16 divisors (see below), whose sum is σ = 503214336. Its totient is φ = 305289600.

The previous prime is 400415149. The next prime is 400415173. The reversal of 400415165 is 561514004.

It is not a de Polignac number, because 400415165 - 2⁴ = 400415149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26120 + ... + 38510.

It is an arithmetic number, because the mean of its divisors is an integer number (31450896).

Almost surely, 2^400415165 is an apocalyptic number.

It is an amenable number.

400415165 is a deficient number, since it is larger than the sum of its proper divisors (102799171).

400415165 is a wasteful number, since it uses less digits than its factorization.

400415165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12700.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 400415165 is about 20010.3764332408. The cubic root of 400415165 is about 737.0611250758.

Adding to 400415165 its reverse (561514004), we get a palindrome (961929169).

The spelling of 400415165 in words is "four hundred million, four hundred fifteen thousand, one hundred sixty-five".