16279440 has 80 divisors (see below), whose sum is σ = 52228800. Its totient is φ = 4189696.

The previous prime is 16279429. The next prime is 16279453. The reversal of 16279440 is 4497261.

It is a happy number.

16279440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5791 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (652860).

Almost surely, 2^16279440 is an apocalyptic number.

16279440 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 16279440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26114400).

16279440 is an abundant number, since it is smaller than the sum of its proper divisors (35949360).

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

16279440 is a wasteful number, since it uses less digits than its factorization.

16279440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 16279440 is about 4034.7788043460. The cubic root of 16279440 is about 253.4427197666.

The spelling of 16279440 in words is "sixteen million, two hundred seventy-nine thousand, four hundred forty".