1878397 has 8 divisors (see below), whose sum is σ = 1997600. Its totient is φ = 1761264.

The previous prime is 1878389. The next prime is 1878403. The reversal of 1878397 is 7938781.

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 1878397 - 2³ = 1878389 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 (1878367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618 + ... + 2524.

It is an arithmetic number, because the mean of its divisors is an integer number (249700).

2^1878397 is an apocalyptic number.

It is an amenable number.

1878397 is a deficient number, since it is larger than the sum of its proper divisors (119203).

1878397 is a wasteful number, since it uses less digits than its factorization.

1878397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035.

The product of its digits is 84672, while the sum is 43.

The square root of 1878397 is about 1370.5462414672. The cubic root of 1878397 is about 123.3850274330.

The spelling of 1878397 in words is "one million, eight hundred seventy-eight thousand, three hundred ninety-seven".