16723428 has 12 divisors (see below), whose sum is σ = 39021360. Its totient is φ = 5574472.

The previous prime is 16723423. The next prime is 16723463. The reversal of 16723428 is 82432761.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (16723423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696798 + ... + 696821.

It is an arithmetic number, because the mean of its divisors is an integer number (3251780).

Almost surely, 2^16723428 is an apocalyptic number.

It is an amenable number.

16723428 is an abundant number, since it is smaller than the sum of its proper divisors (22297932).

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

16723428 is a wasteful number, since it uses less digits than its factorization.

16723428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393626 (or 1393624 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 16723428 is about 4089.4288109710. The cubic root of 16723428 is about 255.7261271957.

The spelling of 16723428 in words is "sixteen million, seven hundred twenty-three thousand, four hundred twenty-eight".