1864485 has 32 divisors (see below), whose sum is σ = 3790080. Its totient is φ = 851904.

The previous prime is 1864483. The next prime is 1864507. The reversal of 1864485 is 5844681.

1864485 is a `hidden beast` number, since 1 + 8 + 644 + 8 + 5 = 666.

It is not a de Polignac number, because 1864485 - 2¹ = 1864483 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 42 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (118440).

2^1864485 is an apocalyptic number.

1864485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1864485 is an abundant number, since it is smaller than the sum of its proper divisors (1925595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1864485 is a wasteful number, since it uses less digits than its factorization.

1864485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1988 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1864485 is about 1365.4614604594. The cubic root of 1864485 is about 123.0796628497.

The spelling of 1864485 in words is "one million, eight hundred sixty-four thousand, four hundred eighty-five".