16906890 has 128 divisors (see below), whose sum is σ = 54577152. Its totient is φ = 3237120.

The previous prime is 16906867. The next prime is 16906907. The reversal of 16906890 is 9860961.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 29749 + ... + 30311.

It is an arithmetic number, because the mean of its divisors is an integer number (426384).

Almost surely, 2^16906890 is an apocalyptic number.

16906890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16906890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27288576).

16906890 is an abundant number, since it is smaller than the sum of its proper divisors (37670262).

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

16906890 is a wasteful number, since it uses less digits than its factorization.

16906890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 16906890 is about 4111.7988764043. The cubic root of 16906890 is about 256.6578640560.

The spelling of 16906890 in words is "sixteen million, nine hundred six thousand, eight hundred ninety".