1928447 has 2 divisors, whose sum is σ = 1928448. Its totient is φ = 1928446.

The previous prime is 1928419. The next prime is 1928449. The reversal of 1928447 is 7448291.

It is a strong prime.

It is an emirp because it is prime and its reverse (7448291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1928447 - 2⁶ = 1928383 is a prime.

Together with 1928449, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1928449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964223 + 964224.

It is an arithmetic number, because the mean of its divisors is an integer number (964224).

2^1928447 is an apocalyptic number.

1928447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928447 is an equidigital number, since it uses as much as digits as its factorization.

1928447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 1928447 is about 1388.6853495303. The cubic root of 1928447 is about 124.4713029884.

The spelling of 1928447 in words is "one million, nine hundred twenty-eight thousand, four hundred forty-seven".