16689490 has 32 divisors (see below), whose sum is σ = 31622400. Its totient is φ = 6329664.

The previous prime is 16689481. The next prime is 16689503. The reversal of 16689490 is 9498661.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34027 + ... + 34513.

It is an arithmetic number, because the mean of its divisors is an integer number (988200).

Almost surely, 2^16689490 is an apocalyptic number.

16689490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16689490 is a deficient number, since it is larger than the sum of its proper divisors (14932910).

16689490 is a wasteful number, since it uses less digits than its factorization.

16689490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 16689490 is about 4085.2772243754. The cubic root of 16689490 is about 255.5530225192.

The spelling of 16689490 in words is "sixteen million, six hundred eighty-nine thousand, four hundred ninety".