16403361 has 8 divisors (see below), whose sum is σ = 23553600. Its totient is φ = 10094352.

The previous prime is 16403311. The next prime is 16403363. The reversal of 16403361 is 16330461.

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

It is a de Polignac number, because none of the positive numbers 2^k-16403361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16403363) 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, 210261 + ... + 210338.

It is an arithmetic number, because the mean of its divisors is an integer number (2944200).

Almost surely, 2^16403361 is an apocalyptic number.

It is an amenable number.

16403361 is a deficient number, since it is larger than the sum of its proper divisors (7150239).

16403361 is a wasteful number, since it uses less digits than its factorization.

16403361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420615.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 16403361 is about 4050.1062949014. The cubic root of 16403361 is about 254.0841734376.

Subtracting from 16403361 its reverse (16330461), we obtain a square (72900 = 270²).

The spelling of 16403361 in words is "sixteen million, four hundred three thousand, three hundred sixty-one".