20628760 has 32 divisors (see below), whose sum is σ = 47206800. Its totient is φ = 8110720.

The previous prime is 20628757. The next prime is 20628761. The reversal of 20628760 is 6782602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628761) 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 7 ways as a sum of consecutive naturals, for example, 2011 + ... + 6730.

Almost surely, 2^20628760 is an apocalyptic number.

20628760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20628760 is an abundant number, since it is smaller than the sum of its proper divisors (26578040).

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

20628760 is a wasteful number, since it uses less digits than its factorization.

20628760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811 (or 8807 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20628760 is about 4541.8894746570. The cubic root of 20628760 is about 274.2569915566.

The spelling of 20628760 in words is "twenty million, six hundred twenty-eight thousand, seven hundred sixty".