16923438 has 32 divisors (see below), whose sum is σ = 42981120. Its totient is φ = 4835160.

The previous prime is 16923437. The next prime is 16923457. The reversal of 16923438 is 83432961.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16923437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22008 + ... + 22763.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^16923438 is an apocalyptic number.

16923438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16923438 is an abundant number, since it is smaller than the sum of its proper divisors (26057682).

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

16923438 is a wasteful number, since it uses less digits than its factorization.

16923438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44789 (or 44783 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 16923438 is about 4113.8106422148. The cubic root of 16923438 is about 256.7415733093.

The spelling of 16923438 in words is "sixteen million, nine hundred twenty-three thousand, four hundred thirty-eight".