1649894 has 4 divisors (see below), whose sum is σ = 2474844. Its totient is φ = 824946.

The previous prime is 1649887. The next prime is 1649917. The reversal of 1649894 is 4989461.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1649894² = 5444300422472, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 412472 + ... + 412475.

It is an arithmetic number, because the mean of its divisors is an integer number (618711).

2^1649894 is an apocalyptic number.

1649894 is a deficient number, since it is larger than the sum of its proper divisors (824950).

1649894 is an equidigital number, since it uses as much as digits as its factorization.

1649894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824949.

The product of its digits is 62208, while the sum is 41.

The square root of 1649894 is about 1284.4819967598. The cubic root of 1649894 is about 118.1640445568.

It can be divided in two parts, 164989 and 4, that multiplied together give a palindrome (659956).

The spelling of 1649894 in words is "one million, six hundred forty-nine thousand, eight hundred ninety-four".