1986630 has 16 divisors (see below), whose sum is σ = 4767984. Its totient is φ = 529760.

The previous prime is 1986629. The next prime is 1986631. The reversal of 1986630 is 366891.

It is an interprime number because it is at equal distance from previous prime (1986629) and next prime (1986631).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1986591 and 1986600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33081 + ... + 33140.

It is an arithmetic number, because the mean of its divisors is an integer number (297999).

2^1986630 is an apocalyptic number.

1986630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1986630 is an abundant number, since it is smaller than the sum of its proper divisors (2781354).

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

1986630 is a wasteful number, since it uses less digits than its factorization.

1986630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66231.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1986630 is about 1409.4786270107. The cubic root of 1986630 is about 125.7107246384.

The spelling of 1986630 in words is "one million, nine hundred eighty-six thousand, six hundred thirty".