16393642 has 16 divisors (see below), whose sum is σ = 25923240. Its totient is φ = 7763392.

The previous prime is 16393639. The next prime is 16393649. The reversal of 16393642 is 24639361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16232841 + 160801 = 4029^2 + 401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16393598 and 16393607.

It is not an unprimeable number, because it can be changed into a prime (16393649) 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 7 ways as a sum of consecutive naturals, for example, 408 + ... + 5740.

Almost surely, 2^16393642 is an apocalyptic number.

16393642 is a deficient number, since it is larger than the sum of its proper divisors (9529598).

16393642 is a wasteful number, since it uses less digits than its factorization.

16393642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5417.

The product of its digits is 23328, while the sum is 34.

The square root of 16393642 is about 4048.9062720690. The cubic root of 16393642 is about 254.0339818548.

The spelling of 16393642 in words is "sixteen million, three hundred ninety-three thousand, six hundred forty-two".