1986408216 has 48 divisors (see below), whose sum is σ = 5793693360. Its totient is φ = 611202240.

The previous prime is 1986408199. The next prime is 1986408217. The reversal of 1986408216 is 6128046891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986408217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1060180 + ... + 1062051.

It is an arithmetic number, because the mean of its divisors is an integer number (120701945).

Almost surely, 2^1986408216 is an apocalyptic number.

It is an amenable number.

1986408216 is an abundant number, since it is smaller than the sum of its proper divisors (3807285144).

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

1986408216 is a wasteful number, since it uses less digits than its factorization.

1986408216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122256 (or 2122249 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1986408216 is about 44569.1397269456. The cubic root of 1986408216 is about 1257.0604642036.

The spelling of 1986408216 in words is "one billion, nine hundred eighty-six million, four hundred eight thousand, two hundred sixteen".