165288638 has 8 divisors (see below), whose sum is σ = 260982120. Its totient is φ = 78294600.

The previous prime is 165288623. The next prime is 165288667. The reversal of 165288638 is 836882561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 165288592 and 165288601.

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, 2174813 + ... + 2174888.

It is an arithmetic number, because the mean of its divisors is an integer number (32622765).

Almost surely, 2^165288638 is an apocalyptic number.

165288638 is a deficient number, since it is larger than the sum of its proper divisors (95693482).

165288638 is a wasteful number, since it uses less digits than its factorization.

165288638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349722.

The product of its digits is 552960, while the sum is 47.

The square root of 165288638 is about 12856.4628883686. The cubic root of 165288638 is about 548.8002918815.

The spelling of 165288638 in words is "one hundred sixty-five million, two hundred eighty-eight thousand, six hundred thirty-eight".