16923840 has 168 divisors, whose sum is σ = 58015632. Its totient is φ = 4177920.

The previous prime is 16923821. The next prime is 16923847. The reversal of 16923840 is 4832961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16923847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277410 + ... + 277470.

Almost surely, 2^16923840 is an apocalyptic number.

16923840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16923840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29007816).

16923840 is an abundant number, since it is smaller than the sum of its proper divisors (41091792).

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

16923840 is a wasteful number, since it uses less digits than its factorization.

16923840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 16923840 is about 4113.8595017331. The cubic root of 16923840 is about 256.7436061763.

The spelling of 16923840 in words is "sixteen million, nine hundred twenty-three thousand, eight hundred forty".