1920836 has 6 divisors (see below), whose sum is σ = 3361470. Its totient is φ = 960416.

The previous prime is 1920817. The next prime is 1920839. The reversal of 1920836 is 6380291.

It can be written as a sum of positive squares in only one way, i.e., 1188100 + 732736 = 1090^2 + 856^2 .

It is a super-2 number, since 2×1920836² = 7379221877792, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1920799 and 1920808.

It is not an unprimeable number, because it can be changed into a prime (1920839) 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 as a sum of consecutive naturals, namely, 240101 + ... + 240108.

It is an arithmetic number, because the mean of its divisors is an integer number (560245).

2^1920836 is an apocalyptic number.

It is an amenable number.

1920836 is a deficient number, since it is larger than the sum of its proper divisors (1440634).

1920836 is a wasteful number, since it uses less digits than its factorization.

1920836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480213 (or 480211 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1920836 is about 1385.9422787404. The cubic root of 1920836 is about 124.3073368315.

The spelling of 1920836 in words is "one million, nine hundred twenty thousand, eight hundred thirty-six".