1628441 has 2 divisors, whose sum is σ = 1628442. Its totient is φ = 1628440.

The previous prime is 1628401. The next prime is 1628467. The reversal of 1628441 is 1448261.

It is an a-pointer prime, because the next prime (1628467) can be obtained adding 1628441 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 198025 = 1196^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628441 - 2¹⁸ = 1366297 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1628441.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1628401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814220 + 814221.

It is an arithmetic number, because the mean of its divisors is an integer number (814221).

2^1628441 is an apocalyptic number.

It is an amenable number.

1628441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628441 is an equidigital number, since it uses as much as digits as its factorization.

1628441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 26.

The square root of 1628441 is about 1276.1038359005. The cubic root of 1628441 is about 117.6496599082.

The spelling of 1628441 in words is "one million, six hundred twenty-eight thousand, four hundred forty-one".