465665140 has 24 divisors (see below), whose sum is σ = 984132072. Its totient is φ = 185078400.

The previous prime is 465665131. The next prime is 465665141. The reversal of 465665140 is 41566564.

It can be written as a sum of positive squares in 4 ways, for example, as 1004004 + 464661136 = 1002^2 + 21556^2 .

It is a super-2 number, since 2×465665140² = 433688045222439200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 465665140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465665141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71011 + ... + 77290.

It is an arithmetic number, because the mean of its divisors is an integer number (41005503).

Almost surely, 2^465665140 is an apocalyptic number.

It is an amenable number.

465665140 is an abundant number, since it is smaller than the sum of its proper divisors (518466932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

465665140 is a wasteful number, since it uses less digits than its factorization.

465665140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148467 (or 148465 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 465665140 is about 21579.2757061028. The cubic root of 465665140 is about 775.1003075162.

It can be divided in two parts, 4656 and 65140, that added together give a palindrome (69796).

The spelling of 465665140 in words is "four hundred sixty-five million, six hundred sixty-five thousand, one hundred forty".