16279940 has 12 divisors (see below), whose sum is σ = 34187916. Its totient is φ = 6511968.

The previous prime is 16279937. The next prime is 16279973. The reversal of 16279940 is 4997261.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 8248384 = 2834^2 + 2872^2 .

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16279894 and 16279903.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 406979 + ... + 407018.

It is an arithmetic number, because the mean of its divisors is an integer number (2848993).

Almost surely, 2^16279940 is an apocalyptic number.

16279940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16279940 is an abundant number, since it is smaller than the sum of its proper divisors (17907976).

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

16279940 is a wasteful number, since it uses less digits than its factorization.

16279940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814006 (or 814004 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 16279940 is about 4034.8407651356. The cubic root of 16279940 is about 253.4453144518.

The spelling of 16279940 in words is "sixteen million, two hundred seventy-nine thousand, nine hundred forty".