16089945 has 16 divisors (see below), whose sum is σ = 25932480. Its totient is φ = 8518464.

The previous prime is 16089943. The next prime is 16089959. The reversal of 16089945 is 54998061.

It is not a de Polignac number, because 16089945 - 2¹ = 16089943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16089897 and 16089906.

It is not an unprimeable number, because it can be changed into a prime (16089943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1774 + ... + 5943.

It is an arithmetic number, because the mean of its divisors is an integer number (1620780).

Almost surely, 2^16089945 is an apocalyptic number.

16089945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16089945 is a deficient number, since it is larger than the sum of its proper divisors (9842535).

16089945 is a wasteful number, since it uses less digits than its factorization.

16089945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 16089945 is about 4011.2273682752. The cubic root of 16089945 is about 252.4555095942.

The spelling of 16089945 in words is "sixteen million, eighty-nine thousand, nine hundred forty-five".