20000628 has 48 divisors (see below), whose sum is σ = 52360000. Its totient is φ = 6601824.

The previous prime is 20000623. The next prime is 20000641. The reversal of 20000628 is 82600002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20000628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10923 + ... + 12621.

Almost surely, 2^20000628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26180000).

20000628 is an abundant number, since it is smaller than the sum of its proper divisors (32359372).

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

20000628 is a wasteful number, since it uses less digits than its factorization.

20000628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1813 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20000628 is about 4472.2061669829. The cubic root of 20000628 is about 271.4446027202. Note that the first 3 decimals are identical.

The spelling of 20000628 in words is "twenty million, six hundred twenty-eight", and thus it is an aban number.