396161865 has 72 divisors (see below), whose sum is σ = 779460864. Its totient is φ = 185803200.

The previous prime is 396161861. The next prime is 396161891. The reversal of 396161865 is 568161693.

It is not a de Polignac number, because 396161865 - 2² = 396161861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 396161865.

It is not an unprimeable number, because it can be changed into a prime (396161861) 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 71 ways as a sum of consecutive naturals, for example, 167622 + ... + 169968.

Almost surely, 2^396161865 is an apocalyptic number.

It is an amenable number.

396161865 is a deficient number, since it is larger than the sum of its proper divisors (383298999).

396161865 is a wasteful number, since it uses less digits than its factorization.

396161865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411 (or 2397 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 396161865 is about 19903.8153377688. The cubic root of 396161865 is about 734.4420866795.

It can be divided in two parts, 396 and 161865, that added together give a palindrome (162261).

The spelling of 396161865 in words is "three hundred ninety-six million, one hundred sixty-one thousand, eight hundred sixty-five".