165403896 has 64 divisors (see below), whose sum is σ = 475668480. Its totient is φ = 46949760.

The previous prime is 165403891. The next prime is 165403921. The reversal of 165403896 is 698304561.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165403891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23241 + ... + 29511.

It is an arithmetic number, because the mean of its divisors is an integer number (7432320).

Almost surely, 2^165403896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165403896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237834240).

165403896 is an abundant number, since it is smaller than the sum of its proper divisors (310264584).

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

165403896 is a wasteful number, since it uses less digits than its factorization.

165403896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6440 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 165403896 is about 12860.9445998340. The cubic root of 165403896 is about 548.9278241950.

The spelling of 165403896 in words is "one hundred sixty-five million, four hundred three thousand, eight hundred ninety-six".