20270628 has 48 divisors (see below), whose sum is σ = 60063360. Its totient is φ = 5791392.

The previous prime is 20270617. The next prime is 20270629. The reversal of 20270628 is 82607202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20270629) 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 15 ways as a sum of consecutive naturals, for example, 12651 + ... + 14162.

It is an arithmetic number, because the mean of its divisors is an integer number (1251320).

Almost surely, 2^20270628 is an apocalyptic number.

20270628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20270628 is an abundant number, since it is smaller than the sum of its proper divisors (39792732).

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

20270628 is a wasteful number, since it uses less digits than its factorization.

20270628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26833 (or 26825 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20270628 is about 4502.2914166011. The cubic root of 20270628 is about 272.6606095249.

The spelling of 20270628 in words is "twenty million, two hundred seventy thousand, six hundred twenty-eight".