165419440 has 40 divisors (see below), whose sum is σ = 386336880. Its totient is φ = 65869056.

The previous prime is 165419431. The next prime is 165419467. The reversal of 165419440 is 44914561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×165419440² = 54727182259827200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165419396 and 165419405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13606 + ... + 22714.

It is an arithmetic number, because the mean of its divisors is an integer number (9658422).

Almost surely, 2^165419440 is an apocalyptic number.

165419440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165419440 is an abundant number, since it is smaller than the sum of its proper divisors (220917440).

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

165419440 is a wasteful number, since it uses less digits than its factorization.

165419440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9349 (or 9343 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 165419440 is about 12861.5488958368. The cubic root of 165419440 is about 548.9450190073.

The spelling of 165419440 in words is "one hundred sixty-five million, four hundred nineteen thousand, four hundred forty".