1628706 has 8 divisors (see below), whose sum is σ = 3257424. Its totient is φ = 542900.

The previous prime is 1628701. The next prime is 1628729. The reversal of 1628706 is 6078261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1628706 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1628701) 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, 135720 + ... + 135731.

It is an arithmetic number, because the mean of its divisors is an integer number (407178).

2^1628706 is an apocalyptic number.

1628706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1628706 is a wasteful number, since it uses less digits than its factorization.

1628706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271456.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1628706 is about 1276.2076633526. The cubic root of 1628706 is about 117.6560413632.

The spelling of 1628706 in words is "one million, six hundred twenty-eight thousand, seven hundred six".