28622520 has 96 divisors (see below), whose sum is σ = 95238000. Its totient is φ = 7455168.

The previous prime is 28622519. The next prime is 28622521. The reversal of 28622520 is 2522682.

It is an interprime number because it is at equal distance from previous prime (28622519) and next prime (28622521).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28622521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665619 + ... + 665661.

Almost surely, 2^28622520 is an apocalyptic number.

28622520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28622520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47619000).

28622520 is an abundant number, since it is smaller than the sum of its proper divisors (66615480).

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

28622520 is an equidigital number, since it uses as much as digits as its factorization.

28622520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 53 counting only the distinct ones).

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

The square root of 28622520 is about 5350.0018691586. The cubic root of 28622520 is about 305.8928241861.

The spelling of 28622520 in words is "twenty-eight million, six hundred twenty-two thousand, five hundred twenty".