1628628 has 12 divisors (see below), whose sum is σ = 3800160. Its totient is φ = 542872.

The previous prime is 1628621. The next prime is 1628633. The reversal of 1628628 is 8268261.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628621) 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, 67848 + ... + 67871.

It is an arithmetic number, because the mean of its divisors is an integer number (316680).

2^1628628 is an apocalyptic number.

It is an amenable number.

1628628 is an abundant number, since it is smaller than the sum of its proper divisors (2171532).

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

1628628 is a wasteful number, since it uses less digits than its factorization.

1628628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135726 (or 135724 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 1628628 is about 1276.1771036968. The cubic root of 1628628 is about 117.6541631200.

The spelling of 1628628 in words is "one million, six hundred twenty-eight thousand, six hundred twenty-eight".