20627728 has 20 divisors (see below), whose sum is σ = 43599888. Its totient is φ = 9376160.

The previous prime is 20627713. The next prime is 20627731. The reversal of 20627728 is 82772602.

It is a junction number, because it is equal to n+sod(n) for n = 20627693 and 20627702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58426 + ... + 58777.

Almost surely, 2^20627728 is an apocalyptic number.

It is an amenable number.

20627728 is an abundant number, since it is smaller than the sum of its proper divisors (22972160).

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

20627728 is a wasteful number, since it uses less digits than its factorization.

20627728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117222 (or 117216 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20627728 is about 4541.7758641307. The cubic root of 20627728 is about 274.2524180399.

The spelling of 20627728 in words is "twenty million, six hundred twenty-seven thousand, seven hundred twenty-eight".