1986838 has 8 divisors (see below), whose sum is σ = 3406032. Its totient is φ = 851496.

The previous prime is 1986823. The next prime is 1986839. The reversal of 1986838 is 8386891.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1986794 and 1986803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986839) 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, 70945 + ... + 70972.

It is an arithmetic number, because the mean of its divisors is an integer number (425754).

2^1986838 is an apocalyptic number.

1986838 is a deficient number, since it is larger than the sum of its proper divisors (1419194).

1986838 is a wasteful number, since it uses less digits than its factorization.

1986838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141926.

The product of its digits is 82944, while the sum is 43.

The square root of 1986838 is about 1409.5524112285. The cubic root of 1986838 is about 125.7151117862.

The spelling of 1986838 in words is "one million, nine hundred eighty-six thousand, eight hundred thirty-eight".