16280891 has 8 divisors (see below), whose sum is σ = 18696000. Its totient is φ = 14021640.

The previous prime is 16280881. The next prime is 16280899. The reversal of 16280891 is 19808261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16280891 - 2⁶ = 16280827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16280899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38741 + ... + 39158.

It is an arithmetic number, because the mean of its divisors is an integer number (2337000).

Almost surely, 2^16280891 is an apocalyptic number.

16280891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16280891 is a deficient number, since it is larger than the sum of its proper divisors (2415109).

16280891 is a wasteful number, since it uses less digits than its factorization.

16280891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77929.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 16280891 is about 4034.9586119315. The cubic root of 16280891 is about 253.4502493962.

It can be divided in two parts, 16280 and 891, that added together give a palindrome (17171).

The spelling of 16280891 in words is "sixteen million, two hundred eighty thousand, eight hundred ninety-one".