1722628 has 12 divisors (see below), whose sum is σ = 3039232. Its totient is φ = 854280.

The previous prime is 1722619. The next prime is 1722647. The reversal of 1722628 is 8262271.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1722596 and 1722605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188 + ... + 2203.

2^1722628 is an apocalyptic number.

It is an amenable number.

1722628 is a deficient number, since it is larger than the sum of its proper divisors (1316604).

1722628 is a wasteful number, since it uses less digits than its factorization.

1722628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3520 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 1722628 is about 1312.4892380511. The cubic root of 1722628 is about 119.8755190636.

Adding to 1722628 its reverse (8262271), we get a palindrome (9984899).

The spelling of 1722628 in words is "one million, seven hundred twenty-two thousand, six hundred twenty-eight".