1906320 has 120 divisors (see below), whose sum is σ = 6535296. Its totient is φ = 459264.

The previous prime is 1906297. The next prime is 1906321. The reversal of 1906320 is 236091.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (1906321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40537 + ... + 40583.

2^1906320 is an apocalyptic number.

1906320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3267648).

1906320 is an abundant number, since it is smaller than the sum of its proper divisors (4628976).

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

1906320 is a wasteful number, since it uses less digits than its factorization.

1906320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1906320 is about 1380.6954769246. The cubic root of 1906320 is about 123.9934092924.

The spelling of 1906320 in words is "one million, nine hundred six thousand, three hundred twenty".