16212140 has 72 divisors (see below), whose sum is σ = 40334112. Its totient is φ = 5456640.

The previous prime is 16212139. The next prime is 16212173. The reversal of 16212140 is 4121261.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69464 + ... + 69696.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^16212140 is an apocalyptic number.

16212140 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 16212140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20167056).

16212140 is an abundant number, since it is smaller than the sum of its proper divisors (24121972).

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

16212140 is a wasteful number, since it uses less digits than its factorization.

16212140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 16212140 is about 4026.4301806936. The cubic root of 16212140 is about 253.0929891949.

The spelling of 16212140 in words is "sixteen million, two hundred twelve thousand, one hundred forty".