16999890 has 32 divisors (see below), whose sum is σ = 41264640. Its totient is φ = 4481664.

The previous prime is 16999859. The next prime is 16999897. The reversal of 16999890 is 9899961.

It is not an unprimeable number, because it can be changed into a prime (16999897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (1289520).

Almost surely, 2^16999890 is an apocalyptic number.

16999890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16999890 is an abundant number, since it is smaller than the sum of its proper divisors (24264750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16999890 is a wasteful number, since it uses less digits than its factorization.

16999890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6466.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 16999890 is about 4123.0922861367. The cubic root of 16999890 is about 257.1276044745.

The spelling of 16999890 in words is "sixteen million, nine hundred ninety-nine thousand, eight hundred ninety".