1975640 has 16 divisors (see below), whose sum is σ = 4445280. Its totient is φ = 790240.

The previous prime is 1975627. The next prime is 1975651. The reversal of 1975640 is 465791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1975597 and 1975606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24656 + ... + 24735.

It is an arithmetic number, because the mean of its divisors is an integer number (277830).

2^1975640 is an apocalyptic number.

1975640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1975640 is an abundant number, since it is smaller than the sum of its proper divisors (2469640).

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

1975640 is a wasteful number, since it uses less digits than its factorization.

1975640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49402 (or 49398 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1975640 is about 1405.5746155932. The cubic root of 1975640 is about 125.4784860716.

The spelling of 1975640 in words is "one million, nine hundred seventy-five thousand, six hundred forty".