16749730 has 16 divisors (see below), whose sum is σ = 30885624. Its totient is φ = 6536320.

The previous prime is 16749701. The next prime is 16749731. The reversal of 16749730 is 3794761.

It can be written as a sum of positive squares in 4 ways, for example, as 14356521 + 2393209 = 3789^2 + 1547^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16749730.

It is not an unprimeable number, because it can be changed into a prime (16749731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20017 + ... + 20836.

Almost surely, 2^16749730 is an apocalyptic number.

16749730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16749730 is a deficient number, since it is larger than the sum of its proper divisors (14135894).

16749730 is a wasteful number, since it uses less digits than its factorization.

16749730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40901.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 16749730 is about 4092.6434000533. The cubic root of 16749730 is about 255.8601225600.

The spelling of 16749730 in words is "sixteen million, seven hundred forty-nine thousand, seven hundred thirty".