1628493 has 4 divisors (see below), whose sum is σ = 2171328. Its totient is φ = 1085660.

The previous prime is 1628491. The next prime is 1628507. The reversal of 1628493 is 3948261.

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 1628493 - 2¹ = 1628491 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁴ + 2⁵ + 8⁵ + 4³ + 9 + 3¹³ .

It is a D-number.

It is a Curzon number.

1628493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271413 + ... + 271418.

It is an arithmetic number, because the mean of its divisors is an integer number (542832).

2^1628493 is an apocalyptic number.

It is an amenable number.

1628493 is a deficient number, since it is larger than the sum of its proper divisors (542835).

1628493 is an equidigital number, since it uses as much as digits as its factorization.

1628493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542834.

The product of its digits is 10368, while the sum is 33.

The square root of 1628493 is about 1276.1242102554. The cubic root of 1628493 is about 117.6509121728.

The spelling of 1628493 in words is "one million, six hundred twenty-eight thousand, four hundred ninety-three".