165042440 has 32 divisors (see below), whose sum is σ = 376894080. Its totient is φ = 65030592.

The previous prime is 165042439. The next prime is 165042491. The reversal of 165042440 is 44240561.

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, 28112 + ... + 33471.

It is an arithmetic number, because the mean of its divisors is an integer number (11777940).

Almost surely, 2^165042440 is an apocalyptic number.

165042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165042440 is an abundant number, since it is smaller than the sum of its proper divisors (211851640).

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

165042440 is a wasteful number, since it uses less digits than its factorization.

165042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61661 (or 61657 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 165042440 is about 12846.8844472113. The cubic root of 165042440 is about 548.5276765029.

The spelling of 165042440 in words is "one hundred sixty-five million, forty-two thousand, four hundred forty".