1928081 has 4 divisors (see below), whose sum is σ = 1969152. Its totient is φ = 1887012.

The previous prime is 1928071. The next prime is 1928093. The reversal of 1928081 is 1808291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1808291 = 59 ⋅30649.

It is a cyclic number.

It is not a de Polignac number, because 1928081 - 2¹⁴ = 1911697 is a prime.

It is a super-2 number, since 2×1928081² = 7434992685122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928011) 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, 20465 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (492288).

2^1928081 is an apocalyptic number.

It is an amenable number.

1928081 is a deficient number, since it is larger than the sum of its proper divisors (41071).

1928081 is an equidigital number, since it uses as much as digits as its factorization.

1928081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41070.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1928081 is about 1388.5535639650. The cubic root of 1928081 is about 124.4634280197.

The spelling of 1928081 in words is "one million, nine hundred twenty-eight thousand, eighty-one".