1906688 has 72 divisors (see below), whose sum is σ = 4668300. Its totient is φ = 774144.

The previous prime is 1906673. The next prime is 1906691. The reversal of 1906688 is 8866091.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100343 + ... + 100361.

2^1906688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2334150).

1906688 is an abundant number, since it is smaller than the sum of its proper divisors (2761612).

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

1906688 is an equidigital number, since it uses as much as digits as its factorization.

1906688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1906688 is about 1380.8287366651. The cubic root of 1906688 is about 124.0013874281.

Multiplying 1906688 by its sum of digits (38), we get a square (72454144 = 8512²).

1906688 divided by its sum of digits (38) gives a square (50176 = 224²).

The spelling of 1906688 in words is "one million, nine hundred six thousand, six hundred eighty-eight".