1864489 has 12 divisors (see below), whose sum is σ = 2159920. Its totient is φ = 1603800.

The previous prime is 1864483. The next prime is 1864507. The reversal of 1864489 is 9844681.

It is not a de Polignac number, because 1864489 - 2⁷ = 1864361 is a prime.

It is a super-2 number, since 2×1864489² = 6952638462242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1864483) 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 11 ways as a sum of consecutive naturals, for example, 1894 + ... + 2704.

2^1864489 is an apocalyptic number.

1864489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1864489 is a deficient number, since it is larger than the sum of its proper divisors (295431).

1864489 is a wasteful number, since it uses less digits than its factorization.

1864489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 841 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 1864489 is about 1365.4629251649. The cubic root of 1864489 is about 123.0797508665.

The spelling of 1864489 in words is "one million, eight hundred sixty-four thousand, four hundred eighty-nine".