1920866 has 8 divisors (see below), whose sum is σ = 2887644. Its totient is φ = 958320.

The previous prime is 1920859. The next prime is 1920883. The reversal of 1920866 is 6680291.

It can be written as a sum of positive squares in 2 ways, for example, as 1525225 + 395641 = 1235^2 + 629^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596 + ... + 2048.

2^1920866 is an apocalyptic number.

1920866 is a deficient number, since it is larger than the sum of its proper divisors (966778).

1920866 is a wasteful number, since it uses less digits than its factorization.

1920866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1920866 is about 1385.9531016596. The cubic root of 1920866 is about 124.3079839804.

The spelling of 1920866 in words is "one million, nine hundred twenty thousand, eight hundred sixty-six".