1989455346 has 48 divisors (see below), whose sum is σ = 4347808920. Its totient is φ = 657434880.

The previous prime is 1989455297. The next prime is 1989455389. The reversal of 1989455346 is 6435549891.

1989455346 is a `hidden beast` number, since 1 + 9 + 89 + 4 + 553 + 4 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1839123225 + 150332121 = 42885^2 + 12261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1989455292 and 1989455301.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1331776 + ... + 1333268.

Almost surely, 2^1989455346 is an apocalyptic number.

1989455346 is an abundant number, since it is smaller than the sum of its proper divisors (2358353574).

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

1989455346 is a wasteful number, since it uses less digits than its factorization.

1989455346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2088 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 1989455346 is about 44603.3109309163. The cubic root of 1989455346 is about 1257.7029084701.

The spelling of 1989455346 in words is "one billion, nine hundred eighty-nine million, four hundred fifty-five thousand, three hundred forty-six".