16540730 has 16 divisors (see below), whose sum is σ = 30800520. Its totient is φ = 6388032.

The previous prime is 16540723. The next prime is 16540787. The reversal of 16540730 is 3704561.

It can be written as a sum of positive squares in 4 ways, for example, as 9406489 + 7134241 = 3067^2 + 2671^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16540730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28229 + ... + 28808.

Almost surely, 2^16540730 is an apocalyptic number.

16540730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16540730 is a deficient number, since it is larger than the sum of its proper divisors (14259790).

16540730 is a wasteful number, since it uses less digits than its factorization.

16540730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57073.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 16540730 is about 4067.0296286110. The cubic root of 16540730 is about 254.7914737636.

The spelling of 16540730 in words is "sixteen million, five hundred forty thousand, seven hundred thirty".