1928965 has 4 divisors (see below), whose sum is σ = 2314764. Its totient is φ = 1543168.

The previous prime is 1928963. The next prime is 1928989. The reversal of 1928965 is 5698291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5698291 = 673 ⋅8467.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 743044 = 1089^2 + 862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928965 - 2¹ = 1928963 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928963) 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, 192892 + ... + 192901.

It is an arithmetic number, because the mean of its divisors is an integer number (578691).

2^1928965 is an apocalyptic number.

It is an amenable number.

1928965 is a deficient number, since it is larger than the sum of its proper divisors (385799).

1928965 is an equidigital number, since it uses as much as digits as its factorization.

1928965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385798.

The product of its digits is 38880, while the sum is 40.

The square root of 1928965 is about 1388.8718443399. The cubic root of 1928965 is about 124.4824467331.

The spelling of 1928965 in words is "one million, nine hundred twenty-eight thousand, nine hundred sixty-five".