1989402216 has 16 divisors (see below), whose sum is σ = 4973505600. Its totient is φ = 663134064.

The previous prime is 1989402209. The next prime is 1989402251. The reversal of 1989402216 is 6122049891.

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, 41445856 + ... + 41445903.

It is an arithmetic number, because the mean of its divisors is an integer number (310844100).

Almost surely, 2^1989402216 is an apocalyptic number.

It is an amenable number.

1989402216 is an abundant number, since it is smaller than the sum of its proper divisors (2984103384).

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

1989402216 is a wasteful number, since it uses less digits than its factorization.

1989402216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82891768 (or 82891764 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1989402216 is about 44602.7153433510. The cubic root of 1989402216 is about 1257.6917123823.

The spelling of 1989402216 in words is "one billion, nine hundred eighty-nine million, four hundred two thousand, two hundred sixteen".