1989772054 has 16 divisors (see below), whose sum is σ = 3038193936. Its totient is φ = 977090400.

The previous prime is 1989772049. The next prime is 1989772087. The reversal of 1989772054 is 4502779891.

It is a junction number, because it is equal to n+sod(n) for n = 1989771992 and 1989772010.

It is a congruent number.

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, 70549 + ... + 94639.

It is an arithmetic number, because the mean of its divisors is an integer number (189887121).

Almost surely, 2^1989772054 is an apocalyptic number.

1989772054 is a deficient number, since it is larger than the sum of its proper divisors (1048421882).

1989772054 is a wasteful number, since it uses less digits than its factorization.

1989772054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24831.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1989772054 is about 44606.8610641906. The cubic root of 1989772054 is about 1257.7696442291.

The spelling of 1989772054 in words is "one billion, nine hundred eighty-nine million, seven hundred seventy-two thousand, fifty-four".