16643430 has 48 divisors (see below), whose sum is σ = 45555120. Its totient is φ = 4204224.

The previous prime is 16643401. The next prime is 16643447. The reversal of 16643430 is 3434661.

16643430 is a `hidden beast` number, since 16 + 643 + 4 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 16643394 and 16643403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3157 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (949065).

Almost surely, 2^16643430 is an apocalyptic number.

16643430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16643430 is an abundant number, since it is smaller than the sum of its proper divisors (28911690).

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

16643430 is a wasteful number, since it uses less digits than its factorization.

16643430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765 (or 9762 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 16643430 is about 4079.6360131757. The cubic root of 16643430 is about 255.3177124077.

It can be divided in two parts, 166434 and 30, that added together give a square (166464 = 408²).

The spelling of 16643430 in words is "sixteen million, six hundred forty-three thousand, four hundred thirty".