1975688 has 48 divisors (see below), whose sum is σ = 4412940. Its totient is φ = 823680.

The previous prime is 1975669. The next prime is 1975691. The reversal of 1975688 is 8865791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1800964 + 174724 = 1342^2 + 418^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12506 + ... + 12662.

2^1975688 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 1975688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206470).

1975688 is an abundant number, since it is smaller than the sum of its proper divisors (2437252).

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

1975688 is a wasteful number, since it uses less digits than its factorization.

1975688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 183 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 1975688 is about 1405.5916903568. The cubic root of 1975688 is about 125.4795022686.

It can be divided in two parts, 197 and 5688, that added together give a palindrome (5885).

The spelling of 1975688 in words is "one million, nine hundred seventy-five thousand, six hundred eighty-eight".