1922688 has 48 divisors (see below), whose sum is σ = 5536050. Its totient is φ = 640512.

The previous prime is 1922677. The next prime is 1922689. The reversal of 1922688 is 8862291.

It can be written as a sum of positive squares in only one way, i.e., 1617984 + 304704 = 1272^2 + 552^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1922689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318 + ... + 1986.

2^1922688 is an apocalyptic number.

1922688 is a gapful number since it is divisible by the number (18) 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 1922688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2768025).

1922688 is an abundant number, since it is smaller than the sum of its proper divisors (3613362).

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

1922688 is a wasteful number, since it uses less digits than its factorization.

1922688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1674 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1922688 is about 1386.6102552628. The cubic root of 1922688 is about 124.3472748652.

The spelling of 1922688 in words is "one million, nine hundred twenty-two thousand, six hundred eighty-eight".