16840090 has 16 divisors (see below), whose sum is σ = 31017888. Its totient is φ = 6579216.

The previous prime is 16840067. The next prime is 16840093. The reversal of 16840090 is 9004861.

It is not an unprimeable number, because it can be changed into a prime (16840093) 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 7 ways as a sum of consecutive naturals, for example, 19152 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (1938618).

Almost surely, 2^16840090 is an apocalyptic number.

16840090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16840090 is a deficient number, since it is larger than the sum of its proper divisors (14177798).

16840090 is a wasteful number, since it uses less digits than its factorization.

16840090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39213.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 16840090 is about 4103.6678715510. The cubic root of 16840090 is about 256.3193950464.

It can be divided in two parts, 168400 and 90, that added together give a triangular number (168490 = T₅₈₀).

The spelling of 16840090 in words is "sixteen million, eight hundred forty thousand, ninety".