165833840 has 40 divisors (see below), whose sum is σ = 387618048. Its totient is φ = 65980160.

The previous prime is 165833831. The next prime is 165833851. The reversal of 165833840 is 48338561.

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

It is a junction number, because it is equal to n+sod(n) for n = 165833794 and 165833803.

It is a congruent number.

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, 9854 + ... + 20706.

Almost surely, 2^165833840 is an apocalyptic number.

165833840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165833840 is an abundant number, since it is smaller than the sum of its proper divisors (221784208).

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

165833840 is a wasteful number, since it uses less digits than its factorization.

165833840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057 (or 11051 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 165833840 is about 12877.6488537310. The cubic root of 165833840 is about 549.4030327299.

The spelling of 165833840 in words is "one hundred sixty-five million, eight hundred thirty-three thousand, eight hundred forty".