1722668 has 12 divisors (see below), whose sum is σ = 3028872. Its totient is φ = 857280.

The previous prime is 1722667. The next prime is 1722713. The reversal of 1722668 is 8662271.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 1 + 7 + 2¹¹ + 2¹³ + 6² + 6⁸ + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (1722667) 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, 71 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (252406).

2^1722668 is an apocalyptic number.

It is an amenable number.

1722668 is a deficient number, since it is larger than the sum of its proper divisors (1306204).

1722668 is a wasteful number, since it uses less digits than its factorization.

1722668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032 (or 2030 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 1722668 is about 1312.5044761828. The cubic root of 1722668 is about 119.8764469063.

The spelling of 1722668 in words is "one million, seven hundred twenty-two thousand, six hundred sixty-eight".