1866494 has 8 divisors (see below), whose sum is σ = 3199728. Its totient is φ = 799920.

The previous prime is 1866467. The next prime is 1866499. The reversal of 1866494 is 4946681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66647 + ... + 66674.

It is an arithmetic number, because the mean of its divisors is an integer number (399966).

2^1866494 is an apocalyptic number.

1866494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1866494 is a deficient number, since it is larger than the sum of its proper divisors (1333234).

1866494 is a wasteful number, since it uses less digits than its factorization.

1866494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133330.

The product of its digits is 41472, while the sum is 38.

The square root of 1866494 is about 1366.1969111369. The cubic root of 1866494 is about 123.1238534769.

The spelling of 1866494 in words is "one million, eight hundred sixty-six thousand, four hundred ninety-four".