1866798 has 24 divisors (see below), whose sum is σ = 4155528. Its totient is φ = 605232.

The previous prime is 1866779. The next prime is 1866827. The reversal of 1866798 is 8976681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (173147).

2^1866798 is an apocalyptic number.

1866798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1866798 is an abundant number, since it is smaller than the sum of its proper divisors (2288730).

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

1866798 is a wasteful number, since it uses less digits than its factorization.

1866798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2845 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1866798 is about 1366.3081643612. The cubic root of 1866798 is about 123.1305375987.

The spelling of 1866798 in words is "one million, eight hundred sixty-six thousand, seven hundred ninety-eight".