16840432 has 40 divisors (see below), whose sum is σ = 38006496. Its totient is φ = 7078656.

The previous prime is 16840399. The next prime is 16840433. The reversal of 16840432 is 23404861.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 16840432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840433) 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 7 ways as a sum of consecutive naturals, for example, 4518 + ... + 7354.

Almost surely, 2^16840432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16840432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19003248).

16840432 is an abundant number, since it is smaller than the sum of its proper divisors (21166064).

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

16840432 is a wasteful number, since it uses less digits than its factorization.

16840432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 16840432 is about 4103.7095413784. The cubic root of 16840432 is about 256.3211302042.

The spelling of 16840432 in words is "sixteen million, eight hundred forty thousand, four hundred thirty-two".