165803730 has 32 divisors (see below), whose sum is σ = 411652800. Its totient is φ = 42689472.

The previous prime is 165803723. The next prime is 165803753. The reversal of 165803730 is 37308561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 165803691 and 165803700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94420 + ... + 96159.

It is an arithmetic number, because the mean of its divisors is an integer number (12864150).

Almost surely, 2^165803730 is an apocalyptic number.

165803730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165803730 is an abundant number, since it is smaller than the sum of its proper divisors (245849070).

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

165803730 is a wasteful number, since it uses less digits than its factorization.

165803730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190618.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 165803730 is about 12876.4797207933. The cubic root of 165803730 is about 549.3697795117.

The spelling of 165803730 in words is "one hundred sixty-five million, eight hundred three thousand, seven hundred thirty".