16749890 has 8 divisors (see below), whose sum is σ = 30149820. Its totient is φ = 6699952.

The previous prime is 16749883. The next prime is 16749893. The reversal of 16749890 is 9894761.

It can be written as a sum of positive squares in 2 ways, for example, as 16152361 + 597529 = 4019^2 + 773^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16749893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837485 + ... + 837504.

Almost surely, 2^16749890 is an apocalyptic number.

16749890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16749890 is a deficient number, since it is larger than the sum of its proper divisors (13399930).

16749890 is a wasteful number, since it uses less digits than its factorization.

16749890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674996.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16749890 is about 4092.6629472753. The cubic root of 16749890 is about 255.8609372496.

The spelling of 16749890 in words is "sixteen million, seven hundred forty-nine thousand, eight hundred ninety".