16401236 has 12 divisors (see below), whose sum is σ = 28733460. Its totient is φ = 8191680.

The previous prime is 16401197. The next prime is 16401239. The reversal of 16401236 is 63210461.

It is a happy number.

16401236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6791236 + 9610000 = 2606^2 + 3100^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (2394455).

Almost surely, 2^16401236 is an apocalyptic number.

It is an amenable number.

16401236 is a deficient number, since it is larger than the sum of its proper divisors (12332224).

16401236 is a wasteful number, since it uses less digits than its factorization.

16401236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474 (or 4472 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 16401236 is about 4049.8439476108. The cubic root of 16401236 is about 254.0732010484.

Adding to 16401236 its reverse (63210461), we get a palindrome (79611697).

The spelling of 16401236 in words is "sixteen million, four hundred one thousand, two hundred thirty-six".