28582620 has 144 divisors (see below), whose sum is σ = 91521024. Its totient is φ = 6652800.

The previous prime is 28582613. The next prime is 28582633. The reversal of 28582620 is 2628582.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224997 + ... + 225123.

Almost surely, 2^28582620 is an apocalyptic number.

28582620 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 28582620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45760512).

28582620 is an abundant number, since it is smaller than the sum of its proper divisors (62938404).

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

28582620 is a wasteful number, since it uses less digits than its factorization.

28582620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28582620 is about 5346.2715980391. The cubic root of 28582620 is about 305.7506191506.

The spelling of 28582620 in words is "twenty-eight million, five hundred eighty-two thousand, six hundred twenty".