1889457 has 4 divisors (see below), whose sum is σ = 2519280. Its totient is φ = 1259636.

The previous prime is 1889453. The next prime is 1889471. The reversal of 1889457 is 7549881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1889457 - 2² = 1889453 is a prime.

It is a D-number.

1889457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1889453) 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 3 ways as a sum of consecutive naturals, for example, 314907 + ... + 314912.

It is an arithmetic number, because the mean of its divisors is an integer number (629820).

2^1889457 is an apocalyptic number.

It is an amenable number.

1889457 is a deficient number, since it is larger than the sum of its proper divisors (629823).

1889457 is an equidigital number, since it uses as much as digits as its factorization.

1889457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629822.

The product of its digits is 80640, while the sum is 42.

The square root of 1889457 is about 1374.5752071095. The cubic root of 1889457 is about 123.6267173421.

It can be divided in two parts, 1889 and 457, that added together give a triangular number (2346 = T₆₈).

The spelling of 1889457 in words is "one million, eight hundred eighty-nine thousand, four hundred fifty-seven".