1989366546 has 16 divisors (see below), whose sum is σ = 4038117984. Its totient is φ = 653224704.

The previous prime is 1989366539. The next prime is 1989366619. The reversal of 1989366546 is 6456639891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2473935 + ... + 2474738.

It is an arithmetic number, because the mean of its divisors is an integer number (252382374).

Almost surely, 2^1989366546 is an apocalyptic number.

1989366546 is an abundant number, since it is smaller than the sum of its proper divisors (2048751438).

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

1989366546 is a wasteful number, since it uses less digits than its factorization.

1989366546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948745.

The product of its digits is 8398080, while the sum is 57.

The square root of 1989366546 is about 44602.3154780108. The cubic root of 1989366546 is about 1257.6841955294.

The spelling of 1989366546 in words is "one billion, nine hundred eighty-nine million, three hundred sixty-six thousand, five hundred forty-six".