16690424 has 8 divisors (see below), whose sum is σ = 31294560. Its totient is φ = 8345208.

The previous prime is 16690423. The next prime is 16690459. The reversal of 16690424 is 42409661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16690423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043144 + ... + 1043159.

It is an arithmetic number, because the mean of its divisors is an integer number (3911820).

Almost surely, 2^16690424 is an apocalyptic number.

It is an amenable number.

16690424 is a deficient number, since it is larger than the sum of its proper divisors (14604136).

16690424 is a wasteful number, since it uses less digits than its factorization.

16690424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086309 (or 2086305 counting only the distinct ones).

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

The square root of 16690424 is about 4085.3915357038. The cubic root of 16690424 is about 255.5577896325.

The spelling of 16690424 in words is "sixteen million, six hundred ninety thousand, four hundred twenty-four".