165490388 has 12 divisors (see below), whose sum is σ = 330980832. Its totient is φ = 70924440.

The previous prime is 165490379. The next prime is 165490417. The reversal of 165490388 is 883094561.

165490388 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2955158 + ... + 2955213.

It is an arithmetic number, because the mean of its divisors is an integer number (27581736).

Almost surely, 2^165490388 is an apocalyptic number.

It is an amenable number.

165490388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165490388 is a wasteful number, since it uses less digits than its factorization.

165490388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5910382 (or 5910380 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 165490388 is about 12864.3067438553. The cubic root of 165490388 is about 549.0234881894.

The spelling of 165490388 in words is "one hundred sixty-five million, four hundred ninety thousand, three hundred eighty-eight".