16840730 has 16 divisors (see below), whose sum is σ = 30598560. Its totient is φ = 6672912.

The previous prime is 16840723. The next prime is 16840739. The reversal of 16840730 is 3704861.

It is a super-2 number, since 2×16840730² = 567220373865800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16840693 and 16840702.

It is not an unprimeable number, because it can be changed into a prime (16840739) 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, 6800 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (1912410).

Almost surely, 2^16840730 is an apocalyptic number.

16840730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16840730 is a deficient number, since it is larger than the sum of its proper divisors (13757830).

16840730 is a wasteful number, since it uses less digits than its factorization.

16840730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15853.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 16840730 is about 4103.7458498304. The cubic root of 16840730 is about 256.3226421061.

The spelling of 16840730 in words is "sixteen million, eight hundred forty thousand, seven hundred thirty".