1880397 has 6 divisors (see below), whose sum is σ = 2716142. Its totient is φ = 1253592.

The previous prime is 1880381. The next prime is 1880401. The reversal of 1880397 is 7930881.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 594441 = 1134^2 + 771^2 .

It is not a de Polignac number, because 1880397 - 2⁴ = 1880381 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104458 + ... + 104475.

2^1880397 is an apocalyptic number.

It is an amenable number.

1880397 is a deficient number, since it is larger than the sum of its proper divisors (835745).

1880397 is a wasteful number, since it uses less digits than its factorization.

1880397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208939 (or 208936 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1880397 is about 1371.2756834422. The cubic root of 1880397 is about 123.4288027948.

The spelling of 1880397 in words is "one million, eight hundred eighty thousand, three hundred ninety-seven".