16742720 has 28 divisors (see below), whose sum is σ = 39869364. Its totient is φ = 6696960.

The previous prime is 16742701. The next prime is 16742771. The reversal of 16742720 is 2724761.

It can be written as a sum of positive squares in 2 ways, for example, as 5345344 + 11397376 = 2312^2 + 3376^2 .

It is a congruent number.

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, 25841 + ... + 26480.

Almost surely, 2^16742720 is an apocalyptic number.

16742720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16742720 is an abundant number, since it is smaller than the sum of its proper divisors (23126644).

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

16742720 is an equidigital number, since it uses as much as digits as its factorization.

16742720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52338 (or 52328 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 16742720 is about 4091.7868957217. The cubic root of 16742720 is about 255.8244238805.

The spelling of 16742720 in words is "sixteen million, seven hundred forty-two thousand, seven hundred twenty".