16690457 has 8 divisors (see below), whose sum is σ = 19732800. Its totient is φ = 13812624.

The previous prime is 16690423. The next prime is 16690459. The reversal of 16690457 is 75409661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16690457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16690457.

It is not an unprimeable number, because it can be changed into a prime (16690459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40907 + ... + 41312.

It is an arithmetic number, because the mean of its divisors is an integer number (2466600).

Almost surely, 2^16690457 is an apocalyptic number.

It is an amenable number.

16690457 is a deficient number, since it is larger than the sum of its proper divisors (3042343).

16690457 is an equidigital number, since it uses as much as digits as its factorization.

16690457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82255.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 16690457 is about 4085.3955744824. The cubic root of 16690457 is about 255.5579580604.

The spelling of 16690457 in words is "sixteen million, six hundred ninety thousand, four hundred fifty-seven".