1989670536 has 48 divisors (see below), whose sum is σ = 6158505600. Its totient is φ = 568477152.

The previous prime is 1989670513. The next prime is 1989670567. The reversal of 1989670536 is 6350769891.

1989670536 is a `hidden beast` number, since 19 + 8 + 96 + 7 + 0 + 536 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1973376 + ... + 1974383.

It is an arithmetic number, because the mean of its divisors is an integer number (128302200).

Almost surely, 2^1989670536 is an apocalyptic number.

It is an amenable number.

1989670536 is an abundant number, since it is smaller than the sum of its proper divisors (4168835064).

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

1989670536 is a wasteful number, since it uses less digits than its factorization.

1989670536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947778 (or 3947771 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1989670536 is about 44605.7231305580. The cubic root of 1989670536 is about 1257.7482534321.

The spelling of 1989670536 in words is "one billion, nine hundred eighty-nine million, six hundred seventy thousand, five hundred thirty-six".