653730 has 64 divisors (see below), whose sum is σ = 1963008. Its totient is φ = 135360.

The previous prime is 653713. The next prime is 653743. The reversal of 653730 is 37356.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 653730.

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 31 ways as a sum of consecutive naturals, for example, 2169 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (30672).

2⁶⁵³⁷³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981504).

653730 is an abundant number, since it is smaller than the sum of its proper divisors (1309278).

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

653730 is a wasteful number, since it uses less digits than its factorization.

653730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 653730 is about 808.5357134969. The cubic root of 653730 is about 86.7892905870.

The spelling of 653730 in words is "six hundred fifty-three thousand, seven hundred thirty".