400765165 has 8 divisors (see below), whose sum is σ = 481390848. Its totient is φ = 320297040.

The previous prime is 400765163. The next prime is 400765199. The reversal of 400765165 is 561567004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400765165 - 2¹ = 400765163 is a prime.

It is a super-2 number, since 2×400765165² = 321225434954954450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400765165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400765163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33717 + ... + 44026.

It is an arithmetic number, because the mean of its divisors is an integer number (60173856).

Almost surely, 2^400765165 is an apocalyptic number.

It is an amenable number.

400765165 is a deficient number, since it is larger than the sum of its proper divisors (80625683).

400765165 is a wasteful number, since it uses less digits than its factorization.

400765165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78779.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 400765165 is about 20019.1199856537. The cubic root of 400765165 is about 737.2758158011.

The spelling of 400765165 in words is "four hundred million, seven hundred sixty-five thousand, one hundred sixty-five".