16890424 has 8 divisors (see below), whose sum is σ = 31669560. Its totient is φ = 8445208.

The previous prime is 16890421. The next prime is 16890427. The reversal of 16890424 is 42409861.

It is an interprime number because it is at equal distance from previous prime (16890421) and next prime (16890427).

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

It is a self number, because there is not a number n which added to its sum of digits gives 16890424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16890421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055644 + ... + 1055659.

It is an arithmetic number, because the mean of its divisors is an integer number (3958695).

Almost surely, 2^16890424 is an apocalyptic number.

It is an amenable number.

16890424 is a deficient number, since it is larger than the sum of its proper divisors (14779136).

16890424 is a wasteful number, since it uses less digits than its factorization.

16890424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111309 (or 2111305 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 16890424 is about 4109.7961019982. The cubic root of 16890424 is about 256.5745153718.

The spelling of 16890424 in words is "sixteen million, eight hundred ninety thousand, four hundred twenty-four".