165040390 has 16 divisors (see below), whose sum is σ = 298207008. Its totient is φ = 65764096.

The previous prime is 165040339. The next prime is 165040391. The reversal of 165040390 is 93040561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165040391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28747 + ... + 34006.

It is an arithmetic number, because the mean of its divisors is an integer number (18637938).

Almost surely, 2^165040390 is an apocalyptic number.

165040390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165040390 is a deficient number, since it is larger than the sum of its proper divisors (133166618).

165040390 is a wasteful number, since it uses less digits than its factorization.

165040390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63023.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 165040390 is about 12846.8046610821. The cubic root of 165040390 is about 548.5254053974.

The spelling of 165040390 in words is "one hundred sixty-five million, forty thousand, three hundred ninety".