1880645 has 8 divisors (see below), whose sum is σ = 2430456. Its totient is φ = 1388736.

The previous prime is 1880633. The next prime is 1880647. The reversal of 1880645 is 5460881.

It can be written as a sum of positive squares in 4 ways, for example, as 36481 + 1844164 = 191^2 + 1358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1880645 - 2⁶ = 1880581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14402 + ... + 14531.

It is an arithmetic number, because the mean of its divisors is an integer number (303807).

2^1880645 is an apocalyptic number.

It is an amenable number.

1880645 is a deficient number, since it is larger than the sum of its proper divisors (549811).

1880645 is a wasteful number, since it uses less digits than its factorization.

1880645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28951.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1880645 is about 1371.3661072084. The cubic root of 1880645 is about 123.4342287762.

The spelling of 1880645 in words is "one million, eight hundred eighty thousand, six hundred forty-five".