20270028 has 48 divisors (see below), whose sum is σ = 48895616. Its totient is φ = 6531840.

The previous prime is 20270027. The next prime is 20270039. The reversal of 20270028 is 82007202.

It is a junction number, because it is equal to n+sod(n) for n = 20269986 and 20270013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20270027) 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, 83988 + ... + 84228.

Almost surely, 2^20270028 is an apocalyptic number.

It is an amenable number.

20270028 is an abundant number, since it is smaller than the sum of its proper divisors (28625588).

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

20270028 is a wasteful number, since it uses less digits than its factorization.

20270028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20270028 is about 4502.2247833710. The cubic root of 20270028 is about 272.6579192945.

The spelling of 20270028 in words is "twenty million, two hundred seventy thousand, twenty-eight".