823730 has 8 divisors (see below), whose sum is σ = 1482732. Its totient is φ = 329488.

The previous prime is 823729. The next prime is 823741. The reversal of 823730 is 37328.

823730 = 523² + 524² + 525².

It can be written as a sum of positive squares in 2 ways, for example, as 744769 + 78961 = 863^2 + 281^2 .

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

It is a super-2 number, since 2×823730² = 1357062225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 823696 and 823705.

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, 41177 + ... + 41196.

2⁸²³⁷³⁰ is an apocalyptic number.

823730 is a deficient number, since it is larger than the sum of its proper divisors (659002).

823730 is a wasteful number, since it uses less digits than its factorization.

823730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82380.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 823730 is about 907.5957249789. The cubic root of 823730 is about 93.7407220448.

The spelling of 823730 in words is "eight hundred twenty-three thousand, seven hundred thirty".