165434840 has 32 divisors (see below), whose sum is σ = 375716880. Its totient is φ = 65553792.

The previous prime is 165434833. The next prime is 165434861. The reversal of 165434840 is 48434561.

It is a self number, because there is not a number n which added to its sum of digits gives 165434840.

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, 15047 + ... + 23606.

Almost surely, 2^165434840 is an apocalyptic number.

165434840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165434840 is an abundant number, since it is smaller than the sum of its proper divisors (210282040).

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

165434840 is a wasteful number, since it uses less digits than its factorization.

165434840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38771 (or 38767 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 165434840 is about 12862.1475656284. The cubic root of 165434840 is about 548.9620534642.

The spelling of 165434840 in words is "one hundred sixty-five million, four hundred thirty-four thousand, eight hundred forty".