16840320 has 192 divisors, whose sum is σ = 62791200. Its totient is φ = 3827712.

The previous prime is 16840309. The next prime is 16840321. The reversal of 16840320 is 2304861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (16840321) 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, 93991 + ... + 94169.

Almost surely, 2^16840320 is an apocalyptic number.

16840320 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 16840320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395600).

16840320 is an abundant number, since it is smaller than the sum of its proper divisors (45950880).

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

16840320 is a wasteful number, since it uses less digits than its factorization.

16840320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 16840320 is about 4103.6958951657. The cubic root of 16840320 is about 256.3205619680.

The spelling of 16840320 in words is "sixteen million, eight hundred forty thousand, three hundred twenty".