165938730 has 16 divisors (see below), whose sum is σ = 398253024. Its totient is φ = 44250320.

The previous prime is 165938711. The next prime is 165938741. The reversal of 165938730 is 37839561.

It is a super-2 number, since 2×165938730² = 55071324228025800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2765616 + ... + 2765675.

It is an arithmetic number, because the mean of its divisors is an integer number (24890814).

Almost surely, 2^165938730 is an apocalyptic number.

165938730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165938730 is an abundant number, since it is smaller than the sum of its proper divisors (232314294).

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

165938730 is a wasteful number, since it uses less digits than its factorization.

165938730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531301.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 165938730 is about 12881.7207701456. The cubic root of 165938730 is about 549.5188408960.

The spelling of 165938730 in words is "one hundred sixty-five million, nine hundred thirty-eight thousand, seven hundred thirty".