28627820 has 48 divisors (see below), whose sum is σ = 65432640. Its totient is φ = 10457856.

The previous prime is 28627811. The next prime is 28627871. The reversal of 28627820 is 2872682.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26246 + ... + 27314.

It is an arithmetic number, because the mean of its divisors is an integer number (1363180).

Almost surely, 2^28627820 is an apocalyptic number.

28627820 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 28627820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32716320).

28627820 is an abundant number, since it is smaller than the sum of its proper divisors (36804820).

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

28627820 is a wasteful number, since it uses less digits than its factorization.

28627820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28627820 is about 5350.4971731606. The cubic root of 28627820 is about 305.9117036316.

The spelling of 28627820 in words is "twenty-eight million, six hundred twenty-seven thousand, eight hundred twenty".