16396840 has 32 divisors (see below), whose sum is σ = 39064680.
Its totient is φ = 6172672.
The previous prime is 16396819. The next prime is 16396841. The reversal of 16396840 is 4869361.
It can be written as a sum of positive squares in 4 ways, for example, as 15539364 + 857476 = 3942^2 + 926^2
It is a self number, because there is not a number n which added to its sum of digits gives 16396840.
It is not an unprimeable number, because it can be changed into a prime (16396841) 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, 11377 + ... + 12736.
Almost surely, 216396840 is an apocalyptic number.
16396840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
16396840 is an abundant number, since it is smaller than the sum of its proper divisors (22667840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16396840 is a wasteful number, since it uses less digits than its factorization.
16396840 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 24141 (or 24137 counting only the distinct ones).
The product of its (nonzero) digits is 31104, while the sum is 37.
The square root of 16396840 is about 4049.3011742769.
The cubic root of 16396840 is about 254.0504993936.
The spelling of 16396840 in words is "sixteen million, three hundred ninety-six thousand, eight hundred forty".