220628025 has 36 divisors (see below), whose sum is σ = 397881900. Its totient is φ = 116860800.

The previous prime is 220628021. The next prime is 220628039. The reversal of 220628025 is 520826022.

It can be written as a sum of positive squares in 6 ways, for example, as 50168889 + 170459136 = 7083^2 + 13056^2 .

It is not a de Polignac number, because 220628025 - 2² = 220628021 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220628025.

It is not an unprimeable number, because it can be changed into a prime (220628021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30235 + ... + 36815.

It is an arithmetic number, because the mean of its divisors is an integer number (11052275).

Almost surely, 2^220628025 is an apocalyptic number.

220628025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220628025 is a deficient number, since it is larger than the sum of its proper divisors (177253875).

220628025 is a wasteful number, since it uses less digits than its factorization.

220628025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746 (or 6738 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 220628025 is about 14853.5526053534. The cubic root of 220628025 is about 604.2549624950.

The spelling of 220628025 in words is "two hundred twenty million, six hundred twenty-eight thousand, twenty-five".