1628733 has 4 divisors (see below), whose sum is σ = 2171648. Its totient is φ = 1085820.

The previous prime is 1628729. The next prime is 1628747. The reversal of 1628733 is 3378261.

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 not a de Polignac number, because 1628733 - 2² = 1628729 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1628733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628773) 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, 271453 + ... + 271458.

It is an arithmetic number, because the mean of its divisors is an integer number (542912).

2^1628733 is an apocalyptic number.

It is an amenable number.

1628733 is a deficient number, since it is larger than the sum of its proper divisors (542915).

1628733 is an equidigital number, since it uses as much as digits as its factorization.

1628733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542914.

The product of its digits is 6048, while the sum is 30.

The square root of 1628733 is about 1276.2182415245. The cubic root of 1628733 is about 117.6566915103.

The spelling of 1628733 in words is "one million, six hundred twenty-eight thousand, seven hundred thirty-three".