16723530 has 64 divisors (see below), whose sum is σ = 46552320. Its totient is φ = 4264128.

The previous prime is 16723501. The next prime is 16723537. The reversal of 16723530 is 3532761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16723494 and 16723503.

It is not an unprimeable number, because it can be changed into a prime (16723537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4864 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (727380).

Almost surely, 2^16723530 is an apocalyptic number.

16723530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16723530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23276160).

16723530 is an abundant number, since it is smaller than the sum of its proper divisors (29828790).

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

16723530 is a wasteful number, since it uses less digits than its factorization.

16723530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732 (or 2726 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 16723530 is about 4089.4412821313. The cubic root of 16723530 is about 255.7266471053.

The spelling of 16723530 in words is "sixteen million, seven hundred twenty-three thousand, five hundred thirty".