165260440 has 32 divisors (see below), whose sum is σ = 374312160. Its totient is φ = 65664000.

The previous prime is 165260437. The next prime is 165260471. The reversal of 165260440 is 44062561.

165260440 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165260440² = 54622026057987200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165260399 and 165260408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7641 + ... + 19720.

It is an arithmetic number, because the mean of its divisors is an integer number (11697255).

Almost surely, 2^165260440 is an apocalyptic number.

165260440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165260440 is an abundant number, since it is smaller than the sum of its proper divisors (209051720).

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

165260440 is a wasteful number, since it uses less digits than its factorization.

165260440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27523 (or 27519 counting only the distinct ones).

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

The square root of 165260440 is about 12855.3661947064. The cubic root of 165260440 is about 548.7690819308.

The spelling of 165260440 in words is "one hundred sixty-five million, two hundred sixty thousand, four hundred forty".