16290644 has 6 divisors (see below), whose sum is σ = 28508634. Its totient is φ = 8145320.

The previous prime is 16290613. The next prime is 16290691. The reversal of 16290644 is 44609261.

It is a happy number.

16290644 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 only one way, i.e., 14364100 + 1926544 = 3790^2 + 1388^2 .

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 16290644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036327 + ... + 2036334.

It is an arithmetic number, because the mean of its divisors is an integer number (4751439).

Almost surely, 2^16290644 is an apocalyptic number.

It is an amenable number.

16290644 is a deficient number, since it is larger than the sum of its proper divisors (12217990).

16290644 is a wasteful number, since it uses less digits than its factorization.

16290644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072665 (or 4072663 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 16290644 is about 4036.1669935720. The cubic root of 16290644 is about 253.5008487329.

The spelling of 16290644 in words is "sixteen million, two hundred ninety thousand, six hundred forty-four".