16249644 has 36 divisors (see below), whose sum is σ = 41694744. Its totient is φ = 5334912.

The previous prime is 16249643. The next prime is 16249669. The reversal of 16249644 is 44694261.

16249644 is a `hidden beast` number, since 1 + 6 + 2 + 4 + 9 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16249599 and 16249608.

It is not an unprimeable number, because it can be changed into a prime (16249643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 957 + ... + 5780.

Almost surely, 2^16249644 is an apocalyptic number.

It is an amenable number.

16249644 is an abundant number, since it is smaller than the sum of its proper divisors (25445100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16249644 is a wasteful number, since it uses less digits than its factorization.

16249644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814 (or 6809 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 16249644 is about 4031.0847175419. The cubic root of 16249644 is about 253.2880012762.

The spelling of 16249644 in words is "sixteen million, two hundred forty-nine thousand, six hundred forty-four".