1928162989 has 4 divisors (see below), whose sum is σ = 1928708320. Its totient is φ = 1927617660.

The previous prime is 1928162983. The next prime is 1928163007. The reversal of 1928162989 is 9892618291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1928162989 - 2⁷ = 1928162861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928162983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267327 + ... + 274444.

It is an arithmetic number, because the mean of its divisors is an integer number (482177080).

Almost surely, 2^1928162989 is an apocalyptic number.

It is an amenable number.

1928162989 is a deficient number, since it is larger than the sum of its proper divisors (545331).

1928162989 is an equidigital number, since it uses as much as digits as its factorization.

1928162989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545330.

The product of its digits is 1119744, while the sum is 55.

The square root of 1928162989 is about 43910.8527473562. The cubic root of 1928162989 is about 1244.6519220692.

The spelling of 1928162989 in words is "one billion, nine hundred twenty-eight million, one hundred sixty-two thousand, nine hundred eighty-nine".