16646434 has 32 divisors (see below), whose sum is σ = 31539456. Its totient is φ = 6420480.

The previous prime is 16646431. The next prime is 16646449. The reversal of 16646434 is 43464661.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 16646434.

It is not an unprimeable number, because it can be changed into a prime (16646431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954 + ... + 6994.

It is an arithmetic number, because the mean of its divisors is an integer number (985608).

Almost surely, 2^16646434 is an apocalyptic number.

16646434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16646434 is a deficient number, since it is larger than the sum of its proper divisors (14893022).

16646434 is a wasteful number, since it uses less digits than its factorization.

16646434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its digits is 41472, while the sum is 34.

The square root of 16646434 is about 4080.0041666645. The cubic root of 16646434 is about 255.3330723880. Note that the first 3 decimals are identical.

Subtracting from 16646434 its sum of digits (34), we obtain a square (16646400 = 4080²).

The spelling of 16646434 in words is "sixteen million, six hundred forty-six thousand, four hundred thirty-four".